MAP3222 MGCHIP | Alldatasheet
Document overview
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- PDF pages: 15
Technical content
Features
/bdash2 Dual output into single package /bdash2 Wide input voltage range up to 20V /bdash2 PWM Dimming /bdash2 Current Mode Control Type /bdash2 Auto Restart Mode Protection /bdash2 Programmable Output Over Voltage Protection /bdash2 Programmable LED Short current Protection /bdash2 Boost switch current limit protection /bdash2 Power Good /bdash2 Package : SOIC-20 Pin
Applications
/bdash2 High Brightness white LED backlighting for LCD TVs and monitors /bdash2 General LED lighting applications Datasheet - MAP3 222 Dual Channel High Brightness LED Driver
Datasheet Version 1.0 March 2011. Page 2 MAP3222 – Dual Channel High Brightness LED Driver Pin Configuration Pin Description PIN NO Description
1 VCC Power Supply Input
2 PDIMO1 Ch#1 Dimming PWM Gate Driver Output
3 ISEN1 Ch#1 LED Current Sense connected to Error Amp. Inverting Input
4 PGOOD Power Good
5 COMP1 Ch#1 Error Amp. Compensation
6 OVP1 Ch#1 Over voltage protection
7 PDIMI1 Ch#1 Dimming PWM Gate Driver Input
8 CS1 Ch#1 Current sense of the Boost Convert
9 GATE1 Ch#1 Gate drive Output for Boost Convert
10 PGND Power GND
11 GATE2 Ch#2 Gate drive Output for Boost Convert
12 CS2 Ch#2 Current sense of the Boost Convert
13 NC No Connection
14 ADIM Analog Dimming for Ch#1 and Ch#2
15 PDIMI2 Ch#2 Dimming PWM Gate Driver Input
16 OVP2 Ch#2 Over voltage protection
17 COMP2 Ch#2 Error Amp. Compensation 18 ISEN2 Ch#2 LED Current Sense connected to Error Amp. Inverting Input
19 PDIMO2 Ch#2 Dimming PWM Gate Driver Output
20 SGND Signal GND
Datasheet Version 1.0 March 2011. Page 3 MAP3222 – Dual Channel High Brightness LED Driver Functional Block Diagram 1msec Timer -8.2V/7.2V Vcc Good 5VBG R 2.5R Gm AMP1 S R Q QB Vcc Good 1VCC Vref CS1 ISEN1 PDIMI1 PGND PWMO1 GATE1 Vcc Good LEB + Prot1 5COMP1 R 2.5R Gm AMP2 S R Q QB CK Vcc Good CS2 ISEN2 PDIMI2 PDIMO2 GATE2 Vcc Good LEB + Prot2
17 COMP2
(1msec) ISEN1 Prot1 OVP1 ADIM 14 CK OVP2 16 AR Protection (1msec) ISEN2 Prot2 3V/2.7V - 3V/2.7V 13 NC SGND 20 PGOOD UVLO Comparator OVP1 Comparator ADIM Comparator SCP1 Comparator SCP2 Comparator OVP2 Comparator 1.4V ADIM*4 1.4V ADIM*4 Default “H” Default “H” 1.25R ISEN2 ISEN1 S R Q 1msec Timer S R Q CK CK Prot1 Prot2 Vcc Good Vcc Good 3.3V
Datasheet Version 1.0 March 2011. Page 4 MAP3222 – Dual Channel High Brightness LED Driver Absolute Maximum Ratings PARAMETER VALUE UNIT VCC -0.3 ~ 24 V GATE1/2, PDIMO1/2 -0.3 ~ 24 V PDIMI1/2, CS1/2, COMP1/2, ISEN1/2, ADIM, OVP1/2 -0.3 ~ 5.5 V PGOOD -0.3 ~ 3.5 V Operating Junction Temperature Range -40 ~ 125 ℃ Storage Temperature Range -65 ~ 150 ℃ Lead temperature(soldering, 10sec ) 260 ℃ Thermal Resistance ( θJA) 90 ℃/W
Datasheet Version 1.0 March 2011. Page 5 MAP3222 – Dual Channel High Brightness LED Driver
Electrical Characteristics
VCC =12V , VPDIMI=5V, C GA TE =C PDIMO=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 ℃ ℃ 8.7 - 20 V IQ Operation quiescent current PDIMI 1/2 =0V - 2 4 mA IOP Operation Current PDIMI 1/2 =5V - - 20 mA VUVLO Under-voltage lockout release threshold - 7.7 8.2 8 .7 V Under-voltage lockout hysteresis - - 1 - V Oscillator FOSC Oscillator frequency T a= 25℃ 190 200 210 kHz T a= -40 ~ 85℃ ℃ 180 200 220 kHz DMAX Maximum duty cycle - - 90 - % GATE (CH1, CH2) ISOURCE Gate short circuit current V GA TE =0, V CC =12V 0.4 - - A ISINK Gate sink current V GA TE =12V, V CC =12V 0.8 - - A TRISE GATE output rise time C GA TE =1nF , V CC =12V - 50 85 ns TFALL GATE output fall time C GA TE =1nF , V CC =12V - 25 45 ns Current Sense (CH1, CH2) TBLANK Leading Edge Blanking - 100 - 375 ns TDELAY Delay to output of CS comparator(2) VCOMP =5V VCS =0V to 600mV step pulse - - 180 ns VCS,MAX Maximum CS Voltage VCC=12V, V ADIM – VISEN > 0.2 0.35 0.4 0.45 V Internal Transconductance Opamp (CH1, CH2) AV Open loop DC Gain(2) - - 70 - dB VCM Input common-mode range - 0.1 - 3.0 V VO Output Voltage Low Limit VCC=12V, VISEN – VADIM > 0.2 - 0.6 - V Output Voltage High Limit VCC=12V, VADIM – VISEN > 0.2 - 2.6 - V Gm Transconductance(2) - 400 670 1000 uA/V IBIAS Input Bias current - - 0.5 1 nA
Datasheet Version 1.0 March 2011. Page 6 MAP3222 – Dual Channel High Brightness LED Driver Electrical Characteristics (Continued) VCC =12V , VPDIMI=5V, C GA TE =C PDIMO=1nF, T a=25 , unless otherwise specified℃ SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT Internal Transconductance Opamp (CH1, CH2) VOFFSET Input Offset voltage - -5 - 5 mV I_AMP_SOURCE AMP Source Current V ISEN =1V, VADIM =2V , COMP =1.5V - -100 - uA I_AMP_SINK AMP Sink Current V ISEN =2V, VADIM =1V , COMP =1.5V - 100 - uA Dimming PWM Input (CH1, CH2) VPDIMI(LO) PDIMI input Low voltage - - - 0.8 V VPDIMI(HI) PDIMI input High voltage - 2.0 - - V RPDIMI PDIMI pull-down resistance V PDIMI =5V 50 100 150 ㏀ Dimming PWM Output (CH1, CH2) TRISE,PDIMO PDIMO Output rise time 1nF capacitance at PDIMO - - 300 ns TFALL,PDIMO PDIMO Output fall time 1nF capacitance at PDIMO - - 200 ns Auto Restart Protection ( OVP & SCP ) TAR Auto Restart Time - - 1 - msec Over Voltage Protection (OVP) VOVP Over voltage protection 2.9 3.0 3.1 V VOVPH Over voltage protection hysteresis - 0.3 - V TOVP OVP Filtering time(2) - 200 - ns Short current protection ( SCP ) VTH,SCP SCP Comparator threshold voltage VADIM = 1V ( VTH,SCP =V ADIM * 4) 3.6 4 4.4 V VSCP SCP Comparator input range - 1.4 - 5.0 V TOFF Propagation time for short current detection (2) VADIM =1V , VISEN =3 to 5V step VPDIMO goes from high to low - - 250 ns PGOOD Impedance RUP Pull-up Resistance PGOOD = 3.3V - 9 - ㏀ RDOWN Pull-Down Resistance - 1.5 - ㏀
Datasheet Version 1.0 March 2011. Page 7 MAP3222 – Dual Channel High Brightness LED Driver Note 1 : 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 2 : These parameters, although guaranteed by design, are not tested in mass production.
Datasheet Version 1.0 March 2011. Page 8 MAP3222 – Dual Channel High Brightness LED Driver Typical Operating Characteristics Unless otherwise noted, VCC = 12V, V PDIMI = 5V, and Ta = 25 °C. Operation Current vs. Vcc Quiescent Current vs. Tem p Quiescent Current vs. Vcc Operation Current vs. Temp Under Voltage Lock Out (UVLO) Frequency vs. T emp
Datasheet Version 1.0 March 2011. Page 9 MAP3222 – Dual Channel High Brightness LED Driver Typical Operating Characteristics Unless otherwise noted, VCC = 12V, V PDIMI = 5V, and Ta = 25 °C. Over Voltage Protection.(OVP) Power Good @ ADIM = 1V Powe r Good @ ADIM = 2V Power Good @ ADIM = 3V Short Current Protection. (SCP) @ ADIM = 0.1V Short Current Protection. (SCP) @ ADIM = 1.0V
Datasheet Version 1.0 March 2011. Page 10 MAP3222 – Dual Channel High Brightness LED Driver
Application Information
MAP3222 has an independent dual channel Boost type LED driver. So, it can be controlled independently. Current Mode Boost switching regulator operation MAP3222 is being used Current mode control scheme for boost regulation so its response is fast and output voltage is stable. MAP3222 is designed to be operated in DCM so MAP3222 can be unstable when it operates in CCM and duty cycle is 50% or higher. Supply voltage and Oscillator MAP3222 has wide input voltage ranged from 8.5V to 20V. 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 MAP3222 is being operated at fixed 200KHz and max duty is 90%. LED Current Input setting (ADIM Input) MAP3222’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 RSenseCurrentLED VI 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. Dimming PWM Input MAP3222’s PDIMI signal is used for both Enable and PWM dimming input. MAP3222 is enabled when PDIMI voltage is higher than 2.0V and disabled when PDIMI voltage is lower than 0.8V. This pin has internal 100Kohm pull down resistance PWM Input Condition High Enable Low Disable Protection MAP3222 has Under Voltage Lock Out (UVLO), Boost switch current limit, Output Over Voltage Protection (OVP), LED Short Current Protection(SCP). When OVP and LED SCP are happened, MAP3222 monitors if the failure condition is released or not every 1mS. This is MAP3222’s Auto restart function. 1. Under Voltage Lock Out (UVLO) When VCC is higher than 8.2V, MAP3222’s internal 5V regulator and internal circuitry like oscillator, protections, Gate drivers and PDIMO drivers are enabled, and the MAP3222 starts to operate when PDIMI voltage is higher than 2.0V. If VCC is lower than 7.2V, MAP3222 is disable due to its Under voltage lock out. Fig 2. Schematic for Under voltage Lock out 2. Boost current limit and Current Sense (CS) MAP3222 has the Boost current limit function. If the voltage on CS pin is higher than 0.4V (Typ.), the gate pulse is limited every pulse. MAP3222 has 100nS (Min.) leading edge blank.
Datasheet Version 1.0 March 2011. Page 11 MAP3222 – Dual Channel High Brightness LED Driver 3. Output Over Voltage Protection (OVP) When MAP3222’s output voltage is increased abnormally, MAP3222 stops the switching to protect external components. Fig 3. Schematic for Over voltage protection MAP3222 has 200nS (Typ.) low pass filter on OVP pin, but using external Capacitor (Ca) is recommended to minimize noise. The total values of R1 and R2 need to be lower than 1Mohm. OVP threshold voltage is 3.0V and OVP voltage can be set as below. - OVP set voltage : 210 . 31 R RRVO +×= - OVP release voltage : 217 . 21 R RRVO +×= Ch1: OVP , Ch2: Gate, Ch3: Vout Fig 4. OVP Waveform 4. LED Short Current Protection (SCP) To protect external components, MAP3222 has the LED short protection. If the LED SCP threshold voltage changes based on ADIM voltage as below, so if ISEN voltage is higher than LED SCP threshold voltage, MAP3222 will be in LED SCP mode disabling gate for boost MOSFET and dimming MOSFET. Fig 5. SCP threshold voltage based on ADIM voltage Ch1: ISEN, Ch2: GATE, Ch3: PWMO, Ch3: I_LED Fig 6. LED SCP waveform 5. Auto-Restart Protection The MAP3222 offers Auto Restart protection function which is recovered into normal operation mode when protection condition is cleared. The auto restart time (T AR ) is fixed at 1mS, It is recovered to normal operating mode if SCP or OVP condition is cleared. 6. Power Good (PGOOD) MAP3222 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 and will be low when the LED current is below 70%.
Datasheet Version 1.0 March 2011. Page 12 MAP3222 – Dual Channel High Brightness LED Driver Ch1: PDIMI, Ch2: ADIM, Ch3: ISEN, Ch4: PGOOD Fig 7. Start-up PGOOD waveform 1) Power Good scheme at OVP Protection. Ch1: OVP , Ch2: GATE, Ch3: VOUT, Ch4: PGOOD Fig 8. PGOOD waveform @ OVP Protection When OVP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc. 2) Power Good scheme at SCP Protection. Ch1: PDIMO, Ch2: ADIM, Ch3: ISEN, Ch4: PGOOD Fig 9. PGOOD waveform @ SCP Protection When SCP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc.
Datasheet Version 1.0 March 2011. Page 13 MAP3222 – Dual Channel High Brightness LED Driver Evaluation Board Schematic Condition : Vin=120V, Vout = 63LEDs, LED current = 130mA, OVP set = 303V, Release = 272V, SW Frequency=200KHz Active High C13 C14 C15 VIN VCC Q1-D VO1(+) GATE OVP1 PDIMO1 PDIMO2 SGND ISEN1 GND GATE1 CS1 CS2 ISEN2 VO1(-) VO1(+) VO1(-) PDIMI1 C19 PDIMO3 PDIMO4 ISEN3 ISEN4 VO2(-) C17 C18 Q3-D VO2(+) GATE2 GATE3 CS3 CS4 VO2(+) VO2(-) C10 C11 OVP2 VO1(+) VO2(+) PDIMI2 GND1 C16 GND2 GND3 GND4 GND5 GND6 GND8 COMP1 COMP2 GND7 ADIM PDIMI1 PDIMI2 SGND1PGND C12 Evaluation Board Part List Spec Vendor P/N Input Capacitor 10uF/400V SAMWHA 1 RD22uF/400V Output Capacitor 10uF/400V SAMWHA 1 RD10uF/400V Inductor 150uH ABCO 2 LPF1280-151 Boost MOSFET 3A/400V, N-Ch, SOT223 MagnaChip MDHT3N40 Dimming MOSFET 3A/400V, N-Ch, SOT223 MagnaChip MDHT3N40 Ultrafast Diode 1A/1000V VISHAY UF4007 IC PWM Controller MagnaChip MAP3222 1. SAMWHA : 1) ELECTROLYTIC CAPACITOR, SAMWHA ELECTRIC tel : +82-43-261-0200, http://www.samwha.co.kr/electric 2) MLCC CAPACITOR, SAMWHA CAPACITOR tel : +82-31-330-5872, http://www.samwha.co.kr/capacitor 2. ABCO tel : +82-31-730-5000, http://www.abco.co.kr
Datasheet Version 1.0 March 2011. Page 14 MAP3222 – Dual Channel High Brightness LED Driver 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 1.0 March 2011. Page 15 MAP3222 – Dual Channel High Brightness LED Driver
Revision History
2011-03-18 Version 1.0 Initial release