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| FAN5340 Datasheet, PDF (3/12 Pages) Fairchild Semiconductor – Synchronous Constant-Current Series Boost LED Driver with PWM Brightness Control and Integrated Load Disconnect | |||
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Pin Configuration
GND EN VLED
A1
A2
A3
VIN B1
B3 FB
C1
C2
C3
VOUT SW PGND
Figure 3. WLCSP Package, Top View
A3
A2
A1
B3
B1
C3
C2
C1
Figure 4. WLCSP Package, Bottom View
GND 1
EN 2
VLED 3
FB 4
P1
GND
8 VIN
7 VOUT
6 SW
5 PGND
Figure 5. 8-Pin 3 x 3mm MLP, Top View
Pin Definitions
Pin #
CSP MLP
A1
1
Name
GND
A2
2
EN
A3
3
VLED
B3
4
FB
C3
5
PGND
C2
6
SW
C1
7
VOUT
B1
8
VIN
Description
Analog Ground. All signals are referenced to this pin.
Enable / PWM Brightness Control. A logic LOW on this pin shuts down the IC,
disconnects the LEDs from VOUT, and reduces the current consumption of the IC. This
terminal has an internal pull-down resistor of 300kâ¦.
LED String Output. Connected to the anode of a series string of two to four LEDs.
Current Feedback. The boost regulator regulates this pin to 0.5V to control the LED string
current. Tie this pin via a current-setting resistor (RSET) to GND and the cathode of the LED
string.
Power Ground. The boost switch and gate drivers are grounded at this pin.
Switching Node. Tie inductor L1 from VIN to this pin.
Boost Output Voltage. Output of the boost regulator.
Input Voltage.
© 2010 Fairchild Semiconductor Corporation
FAN5340 ⢠Rev. 1.0.1
3
www.fairchildsemi.com
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