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TPS61177ARGRR Datasheet(PDF) 3 Page - Texas Instruments |
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TPS61177ARGRR Datasheet(HTML) 3 Page - Texas Instruments |
3 / 40 page 3 TPS61177A www.ti.com SNVSA76A – MARCH 2015 – REVISED MARCH 2016 Product Folder Links: TPS61177A Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 5 Pin Configuration and Functions RGR Package 20-Pin VQFN Top View Pin Functions PIN TYPE DESCRIPTION NAME NUMBER AGND 5, 9 — Signal ground of the device. CS1, CS2, CS3, CS4, CS5, CS6 6, 7, 8, 10, 11, 12 I Current sink regulation inputs. They are connected to the cathode of WLEDs. The PWM loop regulates the lowest VCS to 500 mV. Each channel is limited to 30-mA current. Connect any unused CS pin to AGND or leave it open. ENB 19 I Enable pin LXB 16, 17 I Drain connection of the internal PWM switch MOSFET and external Schottky diode. REF 4 O The reference pin for internal error amplifier. Connect a 470-nF ceramic capacitor to REF. PGND 15 — Power ground of the IC. Internally, it connects to the source of the PWM switch. Tie the ground of power stage components to this ground. PWMB 20 I Dimming control logic input. The dimming frequency range is from 100 Hz to 25 kHz. SCL 2 I Clock input for I2C interface SDA 1 I/O Data input for I2C interface VCC 3 I Internal pre-regulator and supply rail for the internal logic. Do not connect any capacitor to VCC pin. VINB 18 I Power supply to the IC VLED 14 I The voltage detect pin for VOUT. |
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