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LP55271TL Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LP55271TL
Description  Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP55271TL Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Connection Diagrams and Package Mark Information (Continued)
Pin Descriptions
Pin
Name
Type
Description
D3
VDD1
P
Supply Voltage
A1
VDD2
P
Supply Voltage
F5
SW1
A
Boost Converter Switch
E5
SW2
A
Boost Converter Switch
D5
FB
A
Boost Converter Feedback
B5
LED1
O
LED1 Driver Output
A5
LED2
O
LED2 Driver Output
B4
LED3
O
LED3 Driver Output
A4
LED4
O
LED4 Driver Output
F2
FLASH
O
Flash LED Driver Output
F3
GNDC
G
Ground for Core Circuitry
D2
RT
A
Oscillator Frequency Setting
C1
VREF
A
Reference Voltage
B1
VDDA
P
Internal LDO
F4
GND_SW1
G
Boost Converter Ground
E4
GND_SW2
G
Boost Converter Ground
C5
GND_LED
G
LEDs 1 to 4 Driver Ground Connection
F1
GND_FLASH
G
Flash Driver Ground Connection
A2
IFLASH
A
Resistor for Flash Current Setting
D1
GNDA
G
Analog Ground Connection
C3
GND
G
Ground
E1
VDD_IO
P
Supply Voltage for Digital Interface
A3
NRST
DI
Low Active Reset
B3
SCL
DI
I
2C Compatible Interface Clock Signal
E2
SDA
OD
I
2C Compatible Interface Data Signal
E3
FLASH_SYNC
DI
FLASH LED Control
D4
T2
DO
Test Pin (Result)
C4
T1
DI
Test Pin (Clock)
C2
ASE1
AI
Audio Input
B2
ASE2
AI
Audio Input
A: Analog Pin D: Digital Pin G: Ground Pin P: Power Pin
I: Input Pin I/O: Input/Output Pin O: Output Pin OD: Open Drain Pin
www.national.com
3


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