MAP3301C MGCHIP | Alldatasheet
Document overview
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Technical content
Features
/bdash2 Wide input voltage : 8.5V ~ 33V /bdash2 Internal Dimming MOSFET /bdash2 PWM & Analog Dimming /bdash2 Current Mode Control Type /bdash2 Fixed Switching frequency : 100KHz /bdash2 Auto Restart Mode Protection /bdash2 Programmable Output Over Voltage Protection /bdash2 Programmable Input Line Voltage Protection /bdash2 LED Short Current Protection /bdash2 Power Good Indication (Open Drain) /bdash2 Small package : SOIC-15 Pin
Applications
/bdash2 High Brightness white LED backlighting for LCD TVs and monitors /bdash2 General LED lighting applications Datasheet - MAP3301C Single Channel LED Driver with Internal Dimming MOSFET
Datasheet Version 1.1 December 2012 Page 2 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Pin Configuration Pin Description PIN NO Description
1 VDD Output for Gate drive voltage
2 GATE Gate drive Output for Boost Convert
3 CS Current sense of the Boost Convert
4 GND Ground
5 ADIM Analog Dimming using DC voltage level
6 VLDO Reference voltage
7 PGOOD Output power good indication
(Open-Drain status output, Normal : Open, Protection : Internal GND)
8 SOU Internal Dim MOSFET Source
9 DRN Internal Dim MOSFET Drain
11 COMP Error Amp. Compensation
12 OVP Over Voltage Protection
13 LUVP Input Line Under Voltage Protection
14 PWMI PWM Dimming Input
15 EN Enable
16 VCC Input Power Supply
Datasheet Version 1.1 December 2012 Page 3 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Functional Block Diagram
Datasheet Version 1.1 December 2012 Page 4 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Absolute Maximum Ratings PARAMETER VALUE UNIT VCC -0.3 ~ 36 V GATE, PWMI, LUVP , VDD -0.3 ~ 20 V VLDO, CS, COMP , ADIM, PGOOD, SOU, OVP , EN -0.3 ~ 5 V DRN Voltage 250 V DRN Current 6.2 A Operating Junction Temperature Range -40 ~ 125 ℃ Absolute Temperature Range (1) -40 ~ 150 ℃ Storage Temperature Range -65 ~ 150 ℃ Lead temperature(soldering, 10sec ) 260 ℃ Thermal Resistance ( θJA) 70 ℃/W Note 1 : Normal electrical operating is not guaranteed out of the operating junction temperature range.
Datasheet Version 1.1 December 2012 Page 5 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Electrical Characteristics
VCC =12V , VPWMI =5V , C GA TE =1nF , T a=25 , unless otherwise specified℃ SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT SUPPLY VCC,OP Input voltage range T a = - 40 ~ 85 ℃ ℃ 8.5 - 33 V ISD Shut down current EN = 0V 40 80 160 uA IQ Operation quiescent current PWMI = 0V , EN = 5V - 2 .5 5.0 mA IOP Operation Current PWMI = 5V , EN = 5V - 10 - mA VEN VEN_L : Logic Low - - - 0.8 V VEN_H : Logic High - 2.0 - - V REN Enable pull down resistor EN = 5V 60 120 240 ㏀ VUVLO Under-voltage release threshold - 7.5 8 8.5 V Under-voltage lockout hysteresis - - 1 - V VLDO & V DD VLDO Reference pin voltage Ta = - 40 ℃ ~ 85 ℃ 4.90 5.00 5.10 V Ta = 25 ℃ 4.95 5.00 5.05 V VLDOLI Line regulation Iref = 0uA, PWMI = 0V, Cref = 0.1uF - - 0.02 %/V VLDOLO Load regulation Iref = 0~500uA, PWMI = 0V, Cref = 0.1uF - - 1 %/mA VDD Gate Drive voltage T a = 25 ℃, Vcc > 12V, No load - 10 - V Oscillator FOSC Oscillator frequency - 95 100 105 kHz DMAX Maximum duty cycle - - 90 - % GATE ISOURCE Gate short circuit current V GA TE = 0, V CC = 12V 0.05 0.18 - A ISINK Gate sink current V GA TE = 10V , V CC = 12V 0.15 0.28 - A TRISE GATE output rise time C GA TE = 1nF , V CC = 12V - 50 - nS TFALL GATE output fall time C GA TE = 1nF , V CC = 12V - 25 - nS VGA TE Gate Output Voltage - - 10 - V
Datasheet Version 1.1 December 2012 Page 6 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Electrical Characteristics (Continued) VCC =12V , VPWMI =5V, C GA TE =1nF , T a=25 , unless otherwise specified℃ SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT Current Sense TBLANK Leading Edge Blanking - 100 - 375 nS TDELAY Delay to output of CS comparator (3) VCOMP = 5V VCS = 0V to 600mV step pulse - - 180 nS VCS,MAX Maximum CS Voltage V CC = 12V , V ADIM – VSOU = 0.2V 0.44 0.49 0.54 V Internal Transconductance Opamp AV Open loop DC Gain (3) - - 53 - dB VCM Input common-mode range - 0.1 - 3.0 V VO Output Voltage Low Limit V CC = 12V , V ADIM – VSOU = 0.2V - 0.6 - V Output Voltage High Limit V CC = 12V , V ADIM – VSOU = 0.2V - 2.6 - V Gm Transconductance (3) - 400 670 1000 uA/V IBIAS Input Bias current - - 0.5 1 nA VOFFSET Input offset voltage - -5 - 5 mV I_AMP_SOURCE AMP Source Current V ADIM = 2V, V SOU = 1V, VCOMP = 1.5V - -100 - uA I_AMP_SINK AMP Sink Current V ADIM = 1V, V SOU = 2V, VCOMP = 1.5V - 100 - uA PWM Input VPWMI(LO) PWMI input Low voltage - - - 0.8 V VPWMI(HI) PWMI input High voltage - 2.0 - - V RPWMI PWMI pull-down resistance V PWMI = 5V 50 100 200 ㏀ PWM Output TRISE.DELAY PWMI_HIGH to DRN On Delay time - - 1.0 1.5 uS TFALL.DELAY PWMI_LOW to DRN Off Delay time - - 0.8 1.2 uS Soft-Start TSS Time for internal soft-start - - 20 - mS
Datasheet Version 1.1 December 2012 Page 7 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Electrical Characteristics (Continued) VCC =12V , VPWMI =5V , CGA TE =1nF , T a=25 , unless otherwise specified℃ SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT Auto Restart Protection ( OVP & LUVP & SCP ) TAR Auto Restart Time - - 2 - mS Over Voltage Protection ( OVP ) VOVP Over voltage protection 2.94 3.0 3.06 V VOVPH Over voltage protection release voltage - 2.7 - V TOVP OVP Filtering time (3) - 200 - nS Line Under Voltage Protection ( LUVP ) VLINE Line under voltage protection - 1.7 1.8 1.9 V VLINEH Line under voltage protection release voltage - - 2.0 - V TLUVP LUVP Filtering time (3) - - 200 - nS Short current protection ( SCP ) VTH,SCP SCP Comparator threshold voltage VADIM = 0.5V (V TH,SCP = V ADIM * 4) 1.8 2.0 2.2 V VSCP SCP Comparator input range - 1.4 - 4.0 V TOFF Propagation time for short current detection (3) - - - 250 nS Power Good Indication – Open Drain (Normal : Open, Abnormal : Internal GND) RPGOOD Power Good on resistance (3) V PGOOD = 1V - 10 100 ohm Internal Dimming MOSFET BV DSS Drain-Source Breakdown Voltage I D = 250 µA, V CC = 0V 250 - - V IDSS Drain Cut-Off Current V DS = 250V, VPWMI = 0V - - 1 uA R DS(ON) Drain-Source ON Resistance V GS = 10V, I D = 3.1A - - 1 Ω TSD Thermal Shutdown T emperature Shutdown Temperature - 150 - ° C Hysteresis, ∆TSD - 30 - Note 2 : Stress beyond the maximum ratings listed above may incur permanent damage to the device. Operating above the recommended conditions for extended time may stress the device and affect device reliability. Also the device may not operate normally above the recommended operating conditions. These are stress ratings only. Note 3 : These parameters, although guaranteed by design, are not tested in mass production.
Datasheet Version 1.1 December 2012 Page 8 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Typical Operating Characteristics Unless otherwise noted, VCC = 12V, V PWMI = 5V. Operation Current vs. Temp Quiescent Current vs. Temp VDD vs. Temp Fosc vs. Temp VLDO vs. Temp
Datasheet Version 1.1 December 2012 Page 9 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Application Information
Current Mode Boost switching regulator operation MAP3301C is being used Current mode control scheme for boost regulation so its response is fast and output voltage is stable. Supply voltage and Oscillator MAP3301C has wide input voltage ranged from 8.5V to 33V. 1uF decoupling capacitor is used to stabilize the internal regulator and minimize noise on VCC pin. This decoupling capacitor should be placed next to VCC pin. Ceramic capacitor is recommended and incorrect placement of this decoupling capacitor may cause the oscillation in the switching waveform MAP3301C is being operated at fixed 100Khz Switching frequency and max duty is 90%. LED Current Input setting (ADIM Input) MAP3301C’s LED current is set by the voltage on ADIM pin and LED sense resistor value as below. Fig 1. Schematic for LED current set R_Sense _Current _LED V=I ADIM LED The voltage range on ADIM pin is 0.1V ~ 3.0V. But it is recommended that ADIM Input voltage is higher than 0.4V. The GM Amp Input V OFFSET is ±5mV. If ADIM voltage use to below 0.4V, LED current tolerance is increases. Dimming PWM Input MAP3301C’s PWMI signal is used for both Enable and PWM dimming input. MAP3301C is enabled when PWMI voltage is higher than 2.0V and disabled when PWMI voltage is lower than 0.8V. This pin has internal 100Kohm pull down resistance. PWM Input Condition High (2.0V) Enable Low (0.8V) Disable Enable Input MAP3301C’s offers an Enable Function. MAP3301C is enabled when EN voltage is higher than 2.0V and disabled when EN voltage is lower than 0.8V. This pin has internal 120Kohm pull down resistance EN Input Condition High (2.0V) Enable Low (0.8V) Disable Protection MAP3301C has Under Voltage Lock Out (UVLO), Boost switch current limit, Output Over Voltage Protection (OVP), Line Under Voltage Protection(LUVP), LED Short Current Protection(SCP). When OVP and LED SCP are happened, MAP3301C monitors if the failure condition is released or not every 2mS at Fs 100Khz. This is MAP3301C’s auto restart function. 1. Under Voltage Lock Out (UVLO) When VCC is higher than 8.0V, MAP3301C’s internal 5V regulator and internal circuitry like oscillator, protections, Gate drivers and PDIMO drivers are enabled, and the MAP3301C starts to operate when PWMI voltage and EN signal are higher than 2.0V. If VCC is lower than 7.0V, MAP3301C is disable due to its under voltage lock out. 2. Boost current limit and Current Sense (CS) MAP3301C has the Boost current limit function. If the voltage on CS pin is higher than 0.49V (Typ.), the gate pulse is limited every pulse. MAP3301C has 100nS (Min.) leading edge blank. 3. Output Over Voltage Protection (OVP) When MAP3301C’s output voltage is increased abnormally, MAP3301C stops the switching to protect external components. MAP3301C has 200nS (Typ.) low pass filter on OVP pin, but using external Capacitor is recommended to minimize noise. The total values of R OVPH and R OVPL need to be lower than 1Mohm.
Datasheet Version 1.1 December 2012 Page 10 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET OVP threshold voltage is 3.0V and OVP voltage can be set as below. - OVP set voltage : OVPL OVPL OVPH O R R+R× 0 . 3=V - OVP release voltage : OVPL OVPL OVPH O R R+R× 7 . 2=V 4. Line Under Voltage Protection (LUVP) When Line voltage is low voltage input, to prevent the stress of the transition for power component, MAP3301C stops the switching to protect external components. MAP3301C has 200nS (Typ.) low pass filter on LUVP pin, but using external Capacitor is recommended to minimize noise. The total values of RLUVPH and R LUVPL need to be lower than 1Mohm. LUVP threshold voltage is 2.0V and LUVP voltage can be set as below. - LUVP set voltage : LUVPL LUVPL LUVPH IN R R+R× 8 . 1 =V - LUVP release voltage : LUVPL LUVPL LUVPH IN R R+R× 0 . 2=V 5. LED Short Current Protection (SCP) To protect external components, MAP3301C has the LED short protection. If the LED SCP threshold voltage changes based on ADIM voltage as below, so if SOU voltage is higher than LED SCP threshold voltage, MAP3301C will be in LED SCP mode disabling gate for boost MOSFET and dimming MOSFET. Fig 2. SCP threshold voltage based on ADIM voltage 6. Auto-Restart Protection The MAP3301C offers Auto Restart protection function which is recovered into normal operation mode when protection condition is cleared. The auto restart time AR ) is 2mS at Fs 100Khz. It is recovered to normal operating mode if SCP or OVP or LUVP condition is cleared. 7. Power Good (PGOOD) MAP3301C has the PGOOD pin to send out the LED current status. PGOOD will be high when the LED current is higher than 70% of normal LED current. 1) Power Good scheme at OVP Protection. When OVP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc or EN Signal 2) Power Good scheme at SCP Protection. When SCP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc or EN signal. 3) PGOOD Pull up resistance is recommending over than 100Kohm.
Datasheet Version 1.1 December 2012 Page 11 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Inductor Selection Inductor value should be decided before system design. Because the selection of the inductor affects the operating mode of CCM (Continuous current mode) or DCM (Discontinuous current mode), In CCM operation, inductor size should be bigger, even though the ripple current and peak current of inductor can be small. In DCM operation, even ripple current and peak current of inductor should be large while the inductor size can be smaller so that it is more effective in BLU of TV and Notebook application. The following is the equation to calculate max value of Inductor. T ×R×D×D) - 1 ( (min) S(max) O critical) ( Where, R 0(max) = Maximum output impedance T S(min) = Minimum Switching Period L(Inductance) > L(critical) → CCM L(Inductance) < L(critical) → DCM OUT IN V V- 1 =D , OUT OUT (max) O I V=R , S (min) S F 1=T Loop Compensation The MAP3301C controls in current mode. Current mode easily achieves compensation by consisting simple single Pole from Double Pole that LC filer makes at Voltage mode In general, crossover frequency is selected from 1/3 ~ 1/6 range of the switching frequency. If fc is large, there is possibility of oscillation to occur, although time response gets better. On the other hand, if fc is small, time response will be bad, while it has improved stability, which may cause over shoot or under shoot in abnormal condition.
Datasheet Version 1.1 December 2012 Page 12 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Physical Dimensions MagnaChip Semiconductor Ltd. doesn’t not recommend the use of its products in hostile environments, including, without limitation, aircraft, nuclear power generation, medical appliances, and devices or systems in which malfunction of any product can reasonably be expected to result in a personal injury. Seller’s customers using or selling Seller’s products for use in such applications do so at their own risk and agree to fully defend and indemnify Seller. MagnaChip reserves the right to change the specifications and circuitry without notice at any time. MagnaChip does not consider responsibility for use of any circuitry other than circuitry entirely included in a MagnaChip product. is a registered trademark of MagnaChip Semiconductor Ltd. MagnaChip Semiconductor Ltd. 891, Daechi-Dong, Kangnam-Gu, Seoul, 135-738 Korea Tel : 82-2-6903-3451 / Fax : 82-2-6903-3668 ~9 www.magnachip.com
Datasheet Version 1.1 December 2012 Page 13 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET
Revision History
2012-12-07 Version 1.0 Initial Release. 2012-12-18 Version 1.1 Separate part Number. (MAP33 01C & MAP3301)