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A6213 Dataheets PDF



Part Number A6213
Manufacturers Allegro
Logo Allegro
Description PWM Dimmable Buck Regulator LED Driver
Datasheet A6213 DatasheetA6213 Datasheet (PDF)

A6213 and A6213-1 Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver FEATURES AND BENEFITS • AEC-Q100 qualified • Supply voltage 6 to 48 V • True average output current control • 3 A maximum output over operating temperature range (1.5 A for A6213-1) • Cycle-by-cycle current limit • Integrated MOSFET switch • Dimming via direct logic input or power supply voltage • Internal control loop compensation • Undervoltage lockout (UVLO) and thermal shutdown protection • Low power.

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A6213 and A6213-1 Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver FEATURES AND BENEFITS • AEC-Q100 qualified • Supply voltage 6 to 48 V • True average output current control • 3 A maximum output over operating temperature range (1.5 A for A6213-1) • Cycle-by-cycle current limit • Integrated MOSFET switch • Dimming via direct logic input or power supply voltage • Internal control loop compensation • Undervoltage lockout (UVLO) and thermal shutdown protection • Low power shutdown (1 µA typical) • Robust protection against: ▫ Adjacent pin-to-pin short ▫ Pin-to-GND short ▫ Component open/short faults PACKAGE: 8-pin SOICN with exposed thermal pad (suffix LJ): Not to scale DESCRIPTION The A6213 is a single IC switching regulator that provides constant-current output to drive high-power LEDs. It integrates a high-side N-channel DMOS switch for DC-to-DC step- down (buck) conversion. A true average current is output using a cycle-by-cycle, controlled on-time method. Output current is user-selectable by an external current sense resistor. Output voltage is automatically adjusted to drive various numbers of LEDs in a single string. This ensures the optimal system efficiency. LED dimming is accomplished by a direct logic input pulsewidth modulation (PWM) signal at the enable pin. The device is provided in a compact 8-pin narrow SOIC package (suffix LJ) with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte-tin leadframe plating. APPLICATIONS: Automotive lighting • Daytime running lights • Front and rear fog lights • Turn/stop lights • Map light • Dimmable interior lights TYPICAL APPLICATION CIRCUIT VIN (6 to 48 V) GND C1 R1 EN Enable/PWM Dimming (100 Hz to 2 kHz) 1 VIN 2 TON 3 EN 4 CS A6213 SW 8 BOOT 7 C4 PAD GND 6 VCC 5 C5 L1 D1 ... LED+ LED– RSENSE A62131-DS, Rev. 9 MCO-0000885 January 21, 2013 June 11, 2021 A6213 and A6213-1 Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver SELECTION GUIDE Part Number A6213KLJTR-T A6213KLJTR-1-T Operating Ambient Temperature, TA –40°C to 125°C –40°C to 125°C Package 8-pin SOICN with exposed thermal pad 8-pin SOICN with exposed thermal pad Packing 3000 pieces per 13-in reel 3000 pieces per 13-in reel ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Supply Voltage Bootstrap Drive Voltage Switching Voltage Linear Regulator Terminal Enable and TON Voltage Current Sense Voltage Maximum Junction Temperature Storage Temperature VIN VBOOT VSW VCC VEN , VTON VCS TJ(max) Tstg VCC to GND Notes Rating Unit –0.3 to 50 V –0.3 to VIN + 8 V –1.5 to VIN + 0.3 V –0.3 to 7 V –0.3 to VIN + 0.3 V –0.3 to 7 V 150 °C –55 to 150 °C THERMAL CHARACTERISTICS*: may require derating at maximum conditions; see application section for optimization Characteristic Symbol Test Conditions* Value Package Thermal Resistance (Junction to Ambient) On 4-layer PCB based on JEDEC standard 35 RθJA On 2-layer generic test PCB with 0.8 in.2 of copper area each side 62 Package Thermal Resistance (Junction to Pad) RθJP 2 *Additional thermal information available on the Allegro website. Unit °C/W °C/W °C/W Pinout Diagram VIN 1 8 SW TON 2 7 BOOT PAD EN 3 6 GND CS 4 5 VCC Terminal List Table Number Name 1 VIN 2 TON 3 EN 4 CS 5 VCC 6 GND 7 BOOT 8 SW – PAD Function Supply voltage input terminals Regulator on-time setting resistor terminal Logic input for Enable and PWM dimming Drive output current sense feedback Internal linear regulator output Ground terminal DMOS gate driver bootstrap terminal Switched output terminals Exposed pad for enhanced thermal dissipation; connect to GND 2 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com A6213 and A6213-1 Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver FUNCTIONAL BLOCK DIAGRAM CVCC VCC CBOOT BOOT SW L1 D1 LED String VIN VIN VREG 5.3 V VCC UVLO TON RON ~VOUT On-Time Current Generator Dithering (±5%) EN + VIL = 0.4 V – VIH = 1.8 V CCOMP + + 0.2 V – – On-Time Timer Off-Time Timer Average Gate Drive UVLO Shutdown IC and Driver Control Logic Level Shift Current Limit Off-Time Timer ILIM VCC UVLO Thermal Shutdown – + Buck Switch Current Sense CS PAD GND RSENSE 3 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com A6213 and A6213-1 Automotive-Grade, Constant-Current PWM Dimmable Buck Regulator LED Driver ELECTRICAL CHARACTERISTICS: Valid at VIN = 24 V, TA = –40°C to 125°C, typical values at TA = 25°C, unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. Max. Unit Input Supply Voltage VIN Undervoltage Lockout Threshold VIN Undervoltage Lockout Hysteresis VIN Pin Supply Current VIN Pin Shutdown Current Buck Switch Current Limit Threshold VIN VUV.


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