Datasheet

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FUNCTIONAL BLOCK DIAGRAM
Undervoltage
Lockout
BiasSupply
AVIN
VOUT
SW
LED
REF
Bandgap
SCL
SDA
AGND
PGND
FLASH_SYNC
CURRENT
CONTROL
LEDCurrentRegulator
P
P
P
SENSEFB
S
Ramp
Compensation
Control
Logic
COMPARATOR
ERROR
AMPLIFIER
OVP
COMPARATOR
GPIOorENVM
VOLTAGE
REGULATION
CURRENT
REGULATION
Control
Logic
DAC
3-bit
ADC
+
-
V =1.22V
REF
V
REF
2MHz
Oscillator
D=k*(VOUT-LED)
ON/OFF
Maxt Timer
ON
2
ICI/F
TPS61050
TPS61052
SLUS525 – MARCH 2007
6
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