Datasheet

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ADDITIONAL APPLICATION CIRCUIT
SW
SEL1
ISET1
ISET2
VIN
IFB2
IOUT
SEL2
EN/PWM
Dimming
GND
VIN
IFB1
C2
1 Fm
1 Fm
R2R1
C2
L1
10 Hm
SEL1
SEL2
IFB1
ON
IFB1
ON
IFB2
ON
IFB2
ON
40ms
Display
Keypad
VIN
SW
GND
SEL2
SEL1
ISET1
IFB1
L1
10 Hm
R1
IFB2
ISET2
R2
IOUT
C2
IC
Shutdown
VIN
C1
1 Fm
1 Fm
TPS61150A
SLVS706 – OCTOBER 2006
Figure 15. Driving Up to 12 WLEDs With One LCD Backlight
Figure 16. Driving a Keypad and LCD Backlight by applying interleaved PWM signal to the SEL1 and
SEL2 pins. The duty cycle of the PWM signal controls brightness dimming
16
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