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TPS61185RGET Datasheet(PDF) 3 Page - Texas Instruments |
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TPS61185RGET Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 26 page  TPS61185 www.ti.com SLVSAA1A – APRIL 2010 – REVISED MAY 2010 RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT VBAT Battery input voltage range 4.2 24 V VOUT Output voltage range VIN 38 V L Inductor 4.7 10 µH CI Input capacitor 1.0 µF CO Output capacitor 2.2 10 µF FPWMO Internal, programmable PWM dimming frequency 0.1 5 kHz FPWMIN Input PWM Frequency 0.1 20 kHz TON Minimum on time in one dimming cycle 5 µs TA Operating ambient temperature –40 85 °C TJ Operating junction temperature –40 125 °C ELECTRICAL CHARACTERISTICS VIN = 10.8 V, EN = Logic High, IFB Current = 20 mA, IFB Voltage = 500 mV, TA = –40°C to 85°C, Typical Values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT VIN Battery input voltage range 4.2 24 V Device enable, VIN = 24 V, Iq_VIN Operating quiescent current into VIN 0.5 3 mA No load, No switch VDD VDD pin output voltage VIN > 5.5 V, ILoad = 3 mA 2.7 3.15 3.6 V VIN = 10.8 V, EN = low 2 10 ISD Shutdown current µA VIN = 21 V, EN = Low 4 15 VIN ramp down 3.7 3.9 4.1 Vin_UVLO VIN under-voltage lockout threshold V VIN ramp up 3.8 4.2 Vin_hys VIN under-voltage lockout hysterisis 100 150 200 mV EN, PWM and MODE VH EN logic high threshold 2.1 20 V VL EN logic Low threshold 0 0.8 V VH PWM logic high threshold 2.1 20 V VL PWM logic low threshold 0 0.8 V VH MODE logic high threshold 2.1 7 V VL MODE logic low threshold 0 0.8 V RPD_EN Pull down resistor on EN VEN = 2.5 V 400 800 1600 k Ω RPD_PWM Pull down resistor on PWM VPWM = 2.5 V 400 800 1600 k Ω CURRENT REGULATION VISET ISET pin voltage ISET current = 20 µA 1.204 1.229 1.253 V KISET Current multiple Iout/ISET ISET current = 20 µA, D = 100% 980 IFB_AVG Average current accuracy ISET current = 20 µA, D = 100% –1.4% 1.4% mA Km (Imax-Imin)/IAVG ISET current = 20 µA, D = 100% 0% 1% 3% Ileak IFB pin leakage current IFB voltage = 20 V on all pins 0 3 µA IIFB_MAX Current sink max output current IFB = 500 mV 25 mA fdim PWM dimming frequency RFPWM = 715 kΩ 190 210 230 Hz BOOST OUTPUT REGULATION VIFB_L VO dial up threshold Measure on IFB 400 mV VIFB_H VO dial down threshold Measure on IFB 900 mV 0.72 × Vreg_L Min Vout regulation voltage V (1+R3/R4) Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS61185 |
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