AN8038 PANASONIC
Document overview
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Technical content
AN8038, AN8038S AC-DC switching power supply control IC with RCC local resonance circuit for improved conformance with energy conservation laws n Overview The AN8038 and AN8038S are self-excited AC-DC switching power supply control IC that adopt RCC local resonance control. These ICs are designed to achieve high efficiency over a wide range of loads (light loads at the standby mode to heavy loads) for improved conformance with energy conservation laws, and support input levels used worldwide. They are particularly appropriate for use in AV and OA equipments. n Features
- Supports improved conformance with energy conser- vation laws by providing two operating modes. With external resistors, it is possible to set the operating point at which the modes change over according to the load power, as shown below. 1.Continuous (RCC) mode High efficiency achieved with local resonance opera- tion (zero cross detection). 2.Discontinuous mode (standby) mode Reduced switching loss and standby power due to re- duced frequency
- Input voltage correction function. This function corrects the maximum on-period in a manner inversely propor- tional to the input voltage.
- Built-in overvoltage protection function (detects at V CC pin)
- Pulse-by-pulse overcurrent protection function (single detection per one cycle)
- Packages: 8-pin DIP ··· AN8038 8-pin SOP ··· AN8038S n Applications
- Facsimiles and other OA equipment
- Printers and other personal computer peripheral equipment
- AV equipment DIP008-P-0300B AN8038 Unit: mm SOP008-P-0225C AN8038S Unit: mm 9.4±0.3 2.54 6.3±0.3 3.8±0.25 0.15 +0.1 –0.05 (3.45) 0.51 min. 1.2±0.25 0.5±0.1 7.62±0.253° to 15° 0.50±0.20 0° to10° 0.15±0.10 (1.05) 5.01±0.20 4.30±0.20 6.40±0.20 Seating plane 1.75 max. 1.45±0.10 0.40+0.10 –0.05 0.10 1.27(0.60)
AN8038, AN8038S Voltage Regulators n Block Diagram 1TR 4IFB CLM GND Out RSTB OVP
8 V CC
(SD latch)S R Q (TR latch) CF latch Q Q Q 17.5 kW 17.5 kW R Q INITOVP 7 V 7 V 4.2 V 0.25 V 1.0 V - 0.2 V I/V conv. V FB TON TOFF High-side clamp RQ S Low-side clamp Current reviser (IFB) Current reviser (ITR) Start Stop Out drive V REF In In Q S R Q
Voltage Regulators AN8038, AN8038S n Pin Descriptions Pin No. Symbol Description 1 TR Transformer reset. When a transformer reset is detected, i.e., a low level is input to this pin, the IC output goes high. However, the transformer reset signal is ignored during the minimum off-period determined by the CF pin. The maximum on-period is also corrected according to the current flowing out of this pin.
2 RSTB Adjusts the light-load detection level that determines the when the IC switches from RCC to
discontinuous operation. When the voltage (VFB ) which is I-V conversion of current feedback signal from IFB pin goes up higher than this pin, minimum off-period current at CF pin decreases, and operating frequency decreases. The detection level can be adjusted arbitrarily using an external pull-down resistor. 3 CF Connection for the capacitor that determines the on and off periods for the IC output (Out).
4 IFB Input for the current feedback signal from the power supply output photocoupler
5 CLM Input of the pulse-by-pulse overcurrent protection circuit. Normally, it will be necessary to add an external filter for this input.
6 GND Ground
7V OUT Output to drive a power MOSFET directly 8V CC Power supply. This pin watches VCC , and has operating threshold voltages for the start, stop, OVP, and OVP reset levels. Parameter Symbol Range Unit Supply voltage V CC From the stop voltage to the OVP operating voltage V n Recommended Operating Range Note) *1: When mounted on a printed circuit board: 477 mW *2: When mounted on a printed circuit board: 191 mW Parameter Symbol Rating Unit Supply voltage V CC 28 V Peak output current I OP -1, +2A Power dissipation AN8038 P D (Ta = 25°C) 500 mW (Independent IC P D (Ta = 85°C) 260 without a heat sink) AN8038S P D (Ta = 25°C) 306 *1 PD (Ta = 85°C) 122 *2 Operating temperature T opr -30 to +85 °C Storage temperature T stg -55 to +150 °C n Absolute Maximum Ratings
AN8038, AN8038S Voltage Regulators n Electrical Characteristics at VCC = 18 V, Ta = 25°C Parameter Symbol Conditions Min Typ Max Unit initial startup supply voltage. operation stop supply voltage Overvoltage protection (OVP) OVP V CC 18.7 20.5 22.3 V operating supply voltage Overvoltage protection (OVP) OVPC V CC 6.6 7.5 8.4 V release supply voltage Overvoltage protection (OVP) OVP I CC1 V CC = 22 V fi 10 V 0.4 0.53 0.66 mA operating time circuit current 1 Overvoltage protection (OVP) OVP I CC2 V CC = 22 V fi 18 V 1.3 1.7 2.1 mA operating time circuit current 2 Transformer reset detection (TR) TR VTH 0.15 0.25 0.35 V threshold voltage Transformer reset detection (TR) TR VCLH ITR = 1 mA 1.2 1.5 1.8 V upper limit clamp voltage Transformer reset detection (TR) TR VCLL ITR = -1 mA - 0.3 - 0.15 0 V lower limit clamp voltage Transformer reset detection (TR) TR ITR V TR = 0.5 V -50 ¾m A pin source current Overcurrent protection (CLM) CLM V TH -225 -205 -185 mV threshold voltage Oscillator (CF) maximum CF GI ON IFB = Open 0.8 1.0 1.2 ¾ on-period current gain Oscillator (CF) maximum CF I ON ITR = 0 mA 210 280 350 mA on-period current Oscillator (CF) minimum CF I OFF1 IIFB = - 0.7 mA -1 560-1 250 -940 mA off-period current 1 Oscillator (CF) minimum CF I OFF2 IIFB = -1.3 mA -70 -55 -40 mA off-period current 2 Output oscillator frequency f OSC CF = 1 000 pF, ITR = -450 mA 105 140 175 kHz IIFB = - 0.5 mA Standby pin (RSTB) voltage V RSTB 3.2 3.5 3.8 V Standby operation (RSTB) RSTB V TH 0.3 0.5 0.7 V threshold voltage Current feedback pin (IFB) voltage VIFB IIFB = - 0.7 mA 5 5.6 6.2 V Pre-startup low-level output voltage STB VOL V CC = 12 V ¾ 1.0 1.25 V Low-level output voltage V OL IOUT = 0.2 A ¾ 0.9 2.0 V High-level output voltage V OH IOUT = - 0.1 A 15.5 16.3 ¾ V Circuit current during startup 1 ISTART1 120 190 280 mA Circuit current 1 OPR1 I CC1 V CC = 10 V 6.1 8.7 11.3 mA Circuit current 2 OPR2 I CC2 V CC = 18 V 6.4 9.1 11.8 mA
Voltage Regulators AN8038, AN8038S Parameter Symbol Conditions Min Typ Max Unit start/stop supply voltage difference Transformer reset (TR) detection TR DV TH ¾ 0.1 ¾ V threshold hysteresis width Oscillator (CF) upper limit voltage VCLH IIFB = - 0.5 mA, CF = 1 000 pF ¾ 4.2 ¾ V Oscillator (CF) lower limit voltage 1 VCFL1 IIFB = - 0.5 mA, CF = 1 000 pF ¾ 1.0 ¾ V Oscillator (CF) lower limit voltage 2 VCFL2 IIFB = - 0.2 mA, CF = 1 000 pF ¾ 0.1 ¾ V Maximum on-period t ON(max) IIFB = - 0.2 mA, CF = 1 000 pF ¾ 12 ¾m s V TR = 0.1 V Minimum off-period 1 t OFF(min)1 IIFB = - 0.2 mA, CF = 1 000 pF ¾ 2.6 ¾m s V TR = 0.1 V Minimum off-period 2 t OFF(min)2 IIFB = -1.3 mA, CF = 1 000 pF ¾ 67 ¾m s ITR = -450 mA Light-load oscillator frequency fOSC2 IIFB = -1.3 mA, CF = 1 000 pF ¾ 15 ¾ kHz ITR = -450 mA Output rise time t r 10% to 90%, IOUT = 0 mA ¾ 40 ¾ ns Output fall time t f 10% to 90%, IOUT = 0 mA ¾ 20 ¾ ns TR output response time t TR ¾ 400 ¾ ns CLM output response time t CLM ¾ 100 ¾ ns Circuit current during startup 2 ISTART2 Ta = -30°C to +85°C 100 190 300 mA n Electrical Characteristics at VCC = 18 V, Ta = 25°C (continued)
- Design Reference Data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed. Pin No. Equivalent Circuit Description I/O
1 TR: I
Transformer reset detection input. When a transformer reset is detected, i.e., a low level is input to this pin, the IC output goes high. However, the transformer reset signal is ignored if the signal is shorter than the minimum off- period determined by the C F pin. Also note that the maximum on-period is corrected according to the source current. n Terminal Equivalent Circuits TR V REF 7 V High-side clamp Low-side clamp
AN8038, AN8038S Voltage Regulators Pin No. Equivalent Circuit Description I/O
2 RSTB: ¾
Adjusts the light-load detection level that deter- mines the time when the IC switches from RCC to discontinuous operation. When the voltage which is I-V conversion of current feedback sig- nal goes up higher than this pin, operating fre- quency is reduced. An arbitrary level can be set by inserting an external pull-down resistor.
3 CF: ¾
Connection for the capacitor that determines the on- and off-periods of the IC output (Out). The on- and off-periods are corrected by ION which is proportional to the flowing out cur- rent at the TR pin, and IOFF which corresponds to the current at IFB pin.
4 IFB: I
Connection for the photocoupler used for the power supply output error-voltage feedback. This input can decrease the photocoupler dark current by about 250 mA.
5 CLM: I
Input to the pulse-by-pulse overcurrent protec- tion circuit. Normally, we recommend adding an external filter for this input.
6 GND: ¾
IC ground. n Terminal Equivalent Circuits (continued) Comp. CF V REF V FB IOFF ION V REF 20 kW 1 kW
- 5· 1 V FB IFB Comp. CLM V REF GND Comp. 2 RSTB 17.5 kW 17.5 kW V REF CF
Voltage Regulators AN8038, AN8038S n Usage Notes The circuit current during startup is set to a low level to minimize power loss due to the startup resistor. However, V CC ripple caused by the power transistor switching on and off may result in incorrect operation of the U.V.L.O. circuit and failure to start. The figure shows the allowable range for VCC ripple. Insert a capacitor near the IC's VCC and GND pins to reduce V CC ripple so that it remains within the allowable range. n Terminal Equivalent Circuits (continued) Pin No. Equivalent Circuit Description I/O 7V OUT :I Output used to directly drive a power MOSFET. A totem pole structure is adopted in this output circuit. The absolute maximum ratings for the output current are: Peak: +2 A, -1 A DC: +200 mA, -100 mA 8V CC : ¾ Power supply. This pin monitors supply voltage and has the threshold for the start, stop, OVP, and OVP reset levels. V CC V OUT V CC 2.5 1.5 0.5 0.6 10 70 100 300 1 000 10 000 V CC ripple frequency (kHz) V CC ripple amplitude (V[p-p]) Allowable VCC ripple range Recommended operating range
AN8038, AN8038S Voltage Regulators n Application Notes [1] Timing charts
- Circuit diagram
- Normal control waveforms (F)(E) (A) (D) (B) (G) (C) CLM TRCF V CC Out OffOffOffOff 0 V (A) Bias winding voltage (B) TR pin voltage (C) CF pin voltage (D) Out pin voltage Winding current Heavy Light Load Continuous (RCC) mode Discontinuous mode 0 V On On On 4.2 V V CC -1.5 V 0 V 0 A V RSTB 0 V Can be modified with an external resistor. Input voltage correction EIN: large, tON : short tON cannot be accepted during tOFF(min). V FB voltage IFB correction V FB : large, tOFF(min): long Off Off Off OffOn On On (E) Primary winding current (F) Secondary winding current
Voltage Regulators AN8038, AN8038S n Application Notes (continued) [1] Timing charts (continued)
- During pulse-by-pulse overcurrent operation OffOffOffOff 0 V (A) Bias winding voltage (B) TR pin voltage (C) CF pin voltage (D) Out pin voltage (E) Winding current (G) CLM pin voltage CLM threshold voltage 0 V On On On On 4.2 V V CC -1.5 V 0 V 0 A -205 mV 0 V V RSTB 0 V Can be modified with an external resistor. Rapid charging during CLM operation On-period limitation during CLM operation V FB voltage Overcurrent detection Off Off Off OffOn On On On Primary winding current HeavyLight Load Secondary winding current
AN8038, AN8038S Voltage Regulators n Application Notes (continued) [2] Operation descriptions 1. Start/stop circuit block
- Startup mechanism After the AC voltage is applied and the supply voltage due to the current in the startup resistor reaches the startup voltage and the IC begins to operate, drive of the power MOSFET begins. This causes a bias in the transformer, and the supply voltage is provided to the IC from the bias winding. (This is point a in fig- ure 1.) During the period between the point when the startup voltage is reached, and the point when the bias winding can generate a voltage enough to supply the IC, the IC sup- ply voltage is provided by the capacitor (C8) connected to V CC . Since the supply voltage falls during this period (area b in figure 1), if the supply voltage falls below the IC stop- voltage before an adequate supply voltage can be provided by the bias winding, it will not be possible to start the power supply. (This is the state at point c in figure 1.)
- Functions This IC includes a function that monitors the V CC voltage. It starts IC operation when VCC reaches the startup voltage (14.4 V typical), and stops operation when the voltage falls below the stop voltage (8.9 V typical). Since a large voltage difference (5.5 V typical) is taken between the start and stop voltages, it is easy to select values for the start resistor and the capacitor connected to V CC . Since high voltages are applied across the startup resistor, measures must be taken to minimize the current that flows in this resistor. (To use a smaller startup resistor.) To achieve this, the circuit current at startup is set to as small as 190 mA (typical), and temperature variations, and also sample-to-sample variations are reduced as well. Since the bias current is reduced, the capacitor connected to V CC can be miniaturized as well. 2. Oscillator circuit The oscillator circuit determines the pulse width with which the main switch is turned on and off using the charge and discharge of the capacitor CCF connected to the CF pin (pin 3). This IC implements a control scheme in which the main switch on-period is the discharge period of the CF pin waveform, and the off-period is the charge period of that waveform. Constant-voltage control in a switching power supply using this IC is implemented during RCC (continuous) operation by holding the main switch off-period fixed and varying the on-period. This on-period is controlled by directly varying the output pulse-width of the oscillator circuit. Additionally, the IC reduces the maximum on-period when the input voltage increases by detecting the input voltage through the flowing out current at the TR pin. (See figure 2.) Furthermore, this IC features an added function that detects increases of the IFB feedback current, and reduces the off period, and lowers the operating frequency to reduce power loss during standby (light load) mode and to prevent being out of control. During overcurrent protection operation, the IC performs a rapid discharge operation where the CLM pin voltage reaches the threshold voltage of -205 mV (typical). Stop voltage Startup voltage a Figure 1 b c Startup failure Startup state Voltage supplied from the bias winding StartupBefore startup GND V CC V OUT Startup resistor After AC rectification
- Oscillator circuit (continued)
Figure 2. On-period block diagram and control waveforms increases when EIN is large.
- Oscillator circuit (continued)
- Notes on switching from RCC operation to discontinuous operation When the state changes from normal load to standby mode, the post-I-V conversion output monitor voltage VFB increases along with the increase of the amount of feedback current. Then, when the IFB pin feedback current exceeds 1 mA (typical) and the VFB voltage becomes larger than the RSTB pin (pin 2) voltage, the minimum off- period current that is from the CF pin lower limit value until the RSTB pin voltage is reached, is rapidly reduced, and the operating frequency is lowered. (See figure 3.) This allows the switching loss to be reduced to the mini- mum, and allows the standby mode power to be reduced. Furthermore, the RSTB pin voltage, which is operating point for switching from RCC operation to discontinuous operation, is set by resistor-division of the internal 7 V reference voltage to a typical value of 3.5 V. This value can be adjusted by connecting an external pull-down resistor, and this can be used to suppress in- creases of the minimum off-period. Note that application designs must take into account the sample-to-sample variations of –15% in the internal resistors and temperature coefficient of 2 400 ppm/°C.
Figure 3. Off-period block diagram and control waveforms
Voltage Regulators AN8038, AN8038S n Application Notes (continued) [2] Operation descriptions (continued) 2. Oscillator circuit (continued)
- Notes on setting the oscillator frequency This section describes the calculation of the on- and off-periods. 1) On-period: tON The output on-period is the discharge period when the CF pin is between the peak value of VCFH = 4.2 V (typical) and VFB . The following formula can be used to calculate the on-period of the power MOSFET as a reasonable approximation. (See figure 2.) tON = CCF · (VCFH - VFB ) / ION Here, V CFH = 4.2 V typ. ION = ITR + 280 mA typ. ITR = (EIN · NB/NP) / (RTR1 + RTR2 ) V FB = 0.7 V typ. (When IIFB £ 250 mA) V FB = 4 kW · (IIFB - 250 mA) + 0.7 V (When IIFB > 250 mA) 2) Off-period: tOFF The minimum off-period is the charging period from VCFL = 0.2 V (typical) to VRSTB . The following formula can be used to calculate the minimum off-period as a reasonable approximation. (See figure 3.) tOFF(min) = CCF · {VRSTB - VCFL } / IOFF IOFF1 = 1250 mA typ. (VFB 0.7 V typ. to VRSTB ) IOFF2 = 55 mA typ. (V FB VRSTB to 4.2 V typ.) tON : On-period tOFF(min) : Minimum off-period C CF : Capacitance of the capacitor connected to the CF pin V CFH : Upper limit voltage for the CF pin. V CFH = 4.2 V typ. V CFL : Lower limit voltage for the CF pin V RSTB : Pin voltage that sets the light load detection level. VRSTB = 3.5 V typ. This voltage can be adjusted with an external resistor. V FB : Value that results from IC internal conversion of feedback current IIFB ION : On-period (CF pin discharge) current IOFF1 : Off-period (CF pin charge) current when IIFB < 1 mA IOFF2 : Off-period (CF pin charge) current when IIFB > 1 mA ITR : Flowing current at TR pin EIN : Primary winding voltage N B : Number of turns in the bias winding N P : Number of turns in the primary winding R TR1 /RTR2 : Resistors connected to the TR pin However, the off-period for the local resonance circuit described later, is determined by the time for the voltage fed back to TR pin (pin 1) if that time is longer than the tOFF time determined by CCF . The power MOSFET is turned on and off continuously by repeating the above operations.
AN8038, AN8038S Voltage Regulators n Application Notes (continued) [2] Operation descriptions (continued) 3. Local resonance operation (power MOSFET turn on delay circuit) The AN8038 and AN8038S transformer reset detection functions detect a low-level input to the TR pin. (This is similar to earlier Panasonic ICs, in particular the AN8026, AN8027, AN8028, and AN8029.) Local resonance operation is possible with circuits as shown in figure 4. C7 is the resonance capacitor, and R9 and C9 form a delay circuit for adjusting the power MOSFET turn on time. When the power MOSFET is off, the voltage that occurs in the drive winding is input to the TR pin (pin 1) through R9 and C9. The power MOSFET will be held in the off state while a high level (a level higher than the threshold voltage, which is 0.25 V typical) is input to the TR pin. The TR pin also has a clamping capability for upper and lower limit voltages. The upper limit voltage is clamped at 1.5 V typical (sink current is -3 mA), and the lower limit voltage is clamped at about - 0.15 V typical (source current: 3 mA). (See figure 5.) The power MOSFET off-period is determined by the longer period of the follow- ing two periods: the period until the TR pin input voltage becomes lower than the threshold voltage as the bias winding voltage falls after the transformer discharges its energy, and the minimum off-period t OFF(min) stipulated by the internal oscillator (see the description of the oscillator circuit). As a result, ringing in the bias winding does not be regarded as a turn on signal during the minimum off-period. Figure 4 N S V O D B N P N B EIN- EIN+ Upper limit clamp current Upper limit clamp 1.5 V typ. 0.25 V typ. Out TR V CC GND Startup resistor Lower limit clamp currentLower limit clamp - 0.15 V typ.Transformer reset comparator
Voltage Regulators AN8038, AN8038S n Application Notes (continued) [2] Operation descriptions (continued) 4. Power supply output control system (IFB: feedback) (continued)
- Soft start When a power supply is started, it starts up in an overloaded state due to the capacitor connected to the power supply output. Since the power supply output voltage is low in this state, the normal constant-voltage control would rise the power supply to its maximum duty ratio. Although the pulse-by-pulse overcurrent protection circuit (CLM) would limit the current, due to filter and other delays, it cannot decrease the pulse width to zero, and thus large currents could flow in both the main switch (the power MOSFET) and the secondary side diode. This could result in destruction of these components in the worst case. To prevent this, soft start is used to suppress surge currents at power supply startup. Soft start is installed by inserting R3 and C4 between the IFB pin (pin 4) and the GND pin (pin 6) as shown in figure 8. When the IC supply voltage reaches the startup voltage, and the start circuit operates, an open bias (about 6.4 V) is output to the IFB pin. A charging current (I IFB) flows from the IFB pin into C4 due to this voltage. As a result, since startup begins at relatively high VFB, output control is started from short tON . Since the voltage across C4 rises according to the time constant determined by R3 and C4, IIFB becomes smaller with time, and the tON time increases gradually. Due to the above operation, the current that flows in the power MOSFET at power-on increases gradually. As a result, surge currents are suppressed. However, this reduces the transient response of the feedback loop, so care is required in designing this circuit. GND V CC IFB Out CLM Startup resistor Rectified AC Figure 8 To AC(-) PC1 5. Output block This IC adopts a totem pole (push-pull) structure output circuit in which NPN transistors as shown in figure 9 sinks and sources current to rapidly drive the power MOSFET which is a capacitive load. This circuit provides maximum sink and source currents of - 0.1 A and +0.2 A (DC), and peak currents of -1 A and +2 A. Furthermore, this circuit has a sink capability of 1 mA (typical) even when the supply voltage has fallen under the stop voltage, and thus can turn off the power MOSFET reliably.
- Operating power supply current characteristics When the OVP circuit operates and the power supply current drops, this can induce a rise of the supply voltage VCC . In the worst case, it may exceed the IC's guaranteed breakdown voltage (28 V). Therefore, the circuit is provided with characteristics that cause the supply current to rise in constant resistance mode when the OVP circuit operates, and thus the increases of the supply voltage. Due to these characteristics, if the supply voltage VCC when the OVP circuit operates is stabilized at a value (note that this value depends on the value of the startup resistor) that is larger than the OVP release voltage (7.5 V typical), the OVP circuit will not be reset as long as the AC input is not cut. (See figure 11.) Note that this does not apply to an external reset.
Figure 11. OVP operating circuit current
7.5 V 10 V 18 V
- Overcurrent protection circuit (pulse-by-pulse overcurrent protection) This circuit uses the fact that overcurrents in the power supply output are proportional to the current flowing in the primary side main switch (power MOSFET). This circuit limits overcurrents in the power supply output by constraining the upper limit of the pulse current flowing in the main switch, and thus protects components sensitive to excessive current. The current flowing in the main switch is detected by connecting a resistor between the power MOSFET source and ground and monitoring the voltage that appears across that resistor. When the power MOSFET is turned on and the CLM (current limit) threshold voltage is detected, the output is turned off. This controls the circuit so that a current in excess of that limit cannot flow by turning off the power MOSFET. The CLM threshold voltage is about -205 mV with respect to ground at T a = 25°C. While this control operation is repeated every cycle, once an overcurrent is detected, the off state is held for the remainder of that cycle, and the circuit is not turned on until the next period. This type of overcurrent detection is called "pulse-by-pulse overcurrent detection." R6 and C6 in figure 12 form a filter circuit that rejects noise gener- ated due to the incidental equivalent parasitic capacitance when the power MOSFET is on. For the grounding point, we rec- ommend that the power MOSFET source pin and the IC GND pin be connected over as short a distance as possible.
- Notes on the detection level precision This overcurrent detection level is reflected on the operating current level of the power supply overcurrent protection function. Therefore, if this detection level varies with sample-to-sample variations or with tem- perature, the operating current level of the overcurrent protection function of the power supply itself will vary. Since variations in this level imply a need for increased ruggedness in parts used, or even the destruction of circuit components, we have increased the precision of this IC as much as possible. Figure 12 CLM GND To AC - R6 R8 C6 Use resistors with no inductance. Use a capacitor with excellent frequency characteristics.
AN8038, AN8038S Voltage Regulators n Application Circuit Examples
- Application circuit example 1 4IFB PC 51TR CLM EIN- GND Out RSTB
8 CC3CF
(MA750 *) MA3D798 (MA10798 *) MA3D760 (MA7D60 *) 15 V/0.4 A 180 mFC12 D2R16 FBI MA2C166 (MA166 *) 0 W C17 1 000 mF 6.0 V/0.6 A C18 47 mF GND AN1431M/T -28 V/30 mA R10
750 W R12
1.8 kW PC1 R13 1.5 kW R11 510 W C15 1.5 mF 2SK1611 2 200 pF 47 W 47 W 820 W MA2C166 (MA166 *) MA2C700 (MA700 *) MA2C700 (MA700 *) R20 5.1 kW 75 kW D11 MA2C166 (MA166 *) 0.22 W R15 51 W 68 kW C11 1 000 pF AN8038, AN8038S 100 mF 0.015 mF 15 kW 0.033 mF C10 PC1 TR RSTB CF FB V CC Out GND CLM
- Application circuit example 2 Note) *: Former part number