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LP8860NQVFPRQ1 Datasheet(PDF) 9 Page - Texas Instruments |
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LP8860NQVFPRQ1 Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 110 page  9 LP8860-Q1 www.ti.com SNVSA21F – MAY 2014 – REVISED JULY 2017 Product Folder Links: LP8860-Q1 Submit Documentation Feedback Copyright © 2014–2017, Texas Instruments Incorporated Current Sinks Electrical Characteristics (continued) Limits apply over the full ambient temperature range –40°C ≤ TA ≤ +125°C. Unless otherwise specified: VDD = 3.3 V, VIN = 12 V, EN/VDDIO = 3.3 V, L = 22 μH, CIN = 2 × 10 μF ceramic and 33 μF electrolytic, COUT = 2 × 10 μF ceramic and 33 μF electrolytic, CVDD = 1 μF, CCPUMP = 10 μF, Q = IPD25N06S4L-30-ND, D = SS5P10-M3/86A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT (2) Saturation voltage is defined as the voltage when the LED current has dropped 10% from the value measured at 1 V. ƒPWM PWM input frequency BRT_MODE[1:0] = 00, 01 and 10 100 500 Hz tPWM MIN Minimum on and off time for PWM input 400 ns IDIM Dimming ratio (input resolution) External 100 Hz PWM 13 000:1 SPI or I2C control 16 bit PWMRES PWM output resolution, PWM control for BRT_MODE[1:0] = 00, 01, and 10 (without dithering) ƒLED_PWM = 5 kHz, ƒOSC = 5 MHz 10 bits ƒLED_PWM= 10 kHz, ƒOSC = 5 MHz 9 ƒLED_PWM = 20 kHz, ƒOSC = 5 MHz 8 ƒLED_PWM = 40 kHz, ƒOSC = 5 MHz 7 ƒLED_PWM = 5 kHz, ƒOSC = 40 MHz 13 ƒLED_PWM = 10 kHz, ƒOSC = 40 MHz 12 ƒLED_PWM = 20 kHz, ƒOSC = 40 MHz 11 ƒLED_PWM = 40 kHz, ƒOSC = 40 MHz 10 ΔIOUT Individual output current adjustment range DRV_OUTx_CORR[3:0] = 1111 –7.4% DRV_OUTx_CORR[3:0] = 0000 6.5% VSAT Saturation voltage(2) IOUT = 150 mA 0.5 0.75 V VSHORT_FAULT_THR LED short detection threshold DRV_LED_FAULT_THR[1:0] = 00 3.6 V DRV_LED_FAULT_THR[1:0] = 01 3.6 DRV_LED_FAULT_THR[1:0] = 10 6.9 DRV_LED_FAULT_THR[1:0] = 11 10.6 (1) Start-up time is measured from the moment the boost is activated until the VOUT crosses 90% of its initial voltage value. 7.7 Boost Converter Characteristics Limits apply over the full ambient temperature range – 40°C ≤ TA ≤ +125°C. Unless otherwise specified: VDD = 3.3 V, VIN = 12 V, EN/VDDIO = 3.3 V, L = 22 μH, CIN = 2 × 10 μF ceramic and 33-μF electrolytic, COUT = 2 × 10 μF ceramic and 33-μF electrolytic, CVDD = 1 μF, CCPUMP = 10 μF, Q = IPD25N06S4L-30-ND, D = SS5P10-M3/86A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ILOAD Maximum continuous load current VIN = 6 V, VBOOST = 48 V (ƒSW = 303 kHz) 600 mA VIN = 3 V, VBOOST = 30 V (ƒSW = 1.1 MHz) 150 VIN = 3 V, VBOOST = 30 V (ƒSW = 2.2 MHz) 100 VOUT/VIN Conversion ratio 10 ƒSW Switching frequency (central frequency if spread spectrum is enabled) BOOST_FREQ = 000 BOOST_FREQ = 001 BOOST_FREQ = 010 BOOST_FREQ = 011 BOOST_FREQ = 100 BOOST_FREQ = 101 BOOST_FREQ = 110 BOOST_FREQ = 111 –7% 100 200 303 400 629 800 1100 2200 7% kHz tBOOST START-UP Start-up time (1) 50 ms |
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