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A6274KLPTR-T Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A6274KLPTR-T Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 24 page Linear Current Regulator and Controller for Automotive LED Arrays A6274, A6274-1 A6284, A6284-1 5 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Characteristics Symbol Test Conditions Min. Typ. Max. Unit INPUT SPECIFICATIONS Operating Input Voltage Range VIN ● 5 – 42 V Input Quiescent Current1 IQ VENx = high, FULL mode – – 6 mA Input Sleep Supply Current1 IQSLEEP VEN1 = VEN2 = 0 V; VDR = VBIAS ● – – 6 μA INTERNAL BIAS CIRCUIT BIAS Pin Voltage VBIAS IBIAS = 0 to 7 mA, 5.6 V ≤ VIN ≤ 18 V ● 4.75 5 5.25 V BIAS Pin Dropout VBIASDROP Minimum voltage drop across VIN and BIAS pins. IBIAS < 7 mA, VIN = 5 V – 0.3 – V VBIAS Undervoltage Release Threshold VBIASSTART VIN rising ● – – 4.6 V VBIAS Undervoltage Lockout Stop Threshold VBIASSTOP VIN falling ● – – 4.2 V P-CHANNEL MOSFET DRIVER SPECIFICATION GATE Sink Current1 IGATE(SINK) Due to on-chip current limit, 10 V < VIN < 18 V 4 – – mA Due to on-chip current limit, VIN = 5 V 2 – – mA GATE Maximum Voltage (w.r.t. VIN) VGATE(MAX) VIN – VGATE, VLEDx = 0.3 V 8 10 12 V GATE Minimum Voltage (w.r.t. VIN) VGATE(MIN) VIN – VGATE, VLEDx = 1 V – 130 360 mV PMOS Detect Threshold VGATE(PMOS) Voltage measured (VIN – VGATE) at end of startup to detect PMOS connected – 600 – mV LEDx CURRENT DRIVER SPECIFICATION LEDx Regulation Voltage2a VLEDreg A6274; not in derating ● – 0.4 0.7 V A6284; not in derating ● – 0.55 0.85 V LEDx Accuracy3 ErrLEDx Measured at ILED(MAX), LEDx mismatch < 0.5 V, 5 V < VIN < 18 V, TJ = 0°C to 150°C – 2 3.5 % LEDx Matching4 ΔILEDx ISET2 connected to BIAS; compared to average ILEDx, measured at ILED(MAX), LEDx mismatch < 1 V, 5 V < VIN < 18 V ● – 0.8 3 % Maximum LEDx Current ILED(MAX) A6274 ● – 60 – mA A6284 ● – 120 – mA Minimum LEDx Current ILED(MIN) A6274 – 6 – mA A6284 – 12 – mA Maximum LED Current, ISETx Pin Short-to- Ground2 ILED(ISETshrt) A6274 – 66 – mA A6284 – 129 – mA LED Current Ramp Time tRAMP ILEDx 10% to 90% and 90% to 10% – 8 – μs ISETx to ILEDx Gain gILED A6274 – 248 – A/A A6284 – 492 – A/A ISETx Voltage Level VISET 0.015 mA ≤ IISETx ≤ 0.3 mA – 1.2 – V Continued on the next page… ELECTRICAL CHARACTERISTICS: Valid at VIN = 14 V, VENx = 3.3 V; ● indicates specifications across the full operating temperature range with TJ = –40°C to 150°C; other specifications are at TJ = 25°C, unless noted otherwise. Refer to Figure 1 for typical application circuit. |
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