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TPS61160DRVTG4 Datasheet(PDF) 27 Page - Texas Instruments |
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TPS61160DRVTG4 Datasheet(HTML) 27 Page - Texas Instruments |
27 / 39 page ![]() Vin 3 V to 5 V L1 22 H m D1 Rset 10 W VIN SW FB GND CTRL COMP C2 20 mA C3 220 nF TPS61161 ON/OFF DIMMING CONTROL C1 L1: TDK VLCF5020T-220MR75-1 C1: Murata GRM188R61A105K C2: Murata GRM21BR71H105K D1: ONsemi MBR0540T1 27 TPS61160, TPS61161 www.ti.com SLVS791E – NOVEMBER 2007 – REVISED JULY 2016 Product Folder Links: TPS61160 TPS61161 Submit Documentation Feedback Copyright © 2007–2016, Texas Instruments Incorporated Figure 27. Li-Ion Driver for 8 White LEDs 8.2.4.1 Design Requirements Example parameters for Li-Ion driver with 8 white LEDs: Table 7. Design Parameters for Li-Ion Driver with 8 White LEDs DESIGN PARAMETER EXAMPLE VALUE Inductor 22 µH Minimum input voltage 3 V Number of series LED 8 LED maximum forward voltage (Vf) 3.2 V Schottky diode forward voltage 0.2 V Efficiency (η) 85% Switching frequency 600 kHz Applying Equation 3 and Equation 4, when VIN is 3 V, 8 LEDs output equivalent to VOUT of 25.8 V, the inductor is 22 μH, the Schottky forward voltage is 0.2 V, the maximum output current is 60 mA in typical condition. 8.2.4.2 Detailed Design Procedure See Detailed Design Procedure. |
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