TPS61160DRVTG4 datasheet(25/39 Pages) TI1

Part #	TPS61160DRVTG4

Description	White LED Drivers With Digital and PWM Brightness Control in 2-mm x 2-mm WSON Package

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V

3 V to 5 V

IN

L1

10

H

m

C1

1

F

m

D1

R

SET

10 W

VIN

SW

FB

GND

CTRL

COMP

C2

0.47

F

m

20 mA

C3

220 nF

TPS61160

ON /OFF

DIMMING

CONTROL

L1: Murata LQH3NPN100NM0

C1: Murata GRM188R61A105K

C2: Murata GRM188R61E474K

D1: ONsemi MBR0540T1

25

TPS61160, TPS61161

www.ti.com

SLVS791E – NOVEMBER 2007 – REVISED JULY 2016

Product Folder Links: TPS61160 TPS61161

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8.2.3 Li-Ion Driver for 6 White LEDs

Figure 23. Li-Ion Driver for 6 White LEDs

8.2.3.1 Design Requirements

Example parameters for Li-Ion drivers with 6 white LEDs:

Table 6. Design Parameters for Li-Ion Driver with 6 White LEDs

DESIGN PARAMETER

EXAMPLE VALUE

Inductor

10 µH

Minimum input voltage

3 V

Number of series LED

6

LED maximum forward voltage (Vf)

3.2 V

Schottky diode forward voltage (Vf)

0.6 V

Efficiency (η)

88%

Switching frequency

600 kHz

Applying Equation 3 and Equation 4, when VIN is 3 V, 6 LEDs output equivalent to VOUT of 19.4 V, the inductor is

10 μH, the Schottky forward voltage is 0.2 V, the maximum output current is 66 mA in typical condition.

8.2.3.2 Detailed Design Procedure

See Detailed Design Procedure.

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