LM3533 Datasheet, PDF (3/53 Pages) Texas Instruments – Complete Lighting Power Solution for Smartphone Handsets

LM3533
Pin Descriptions/Functions
Pin
Name Description
A1
C−
Integrated Charge Pump Flying Capacitor Negative Terminal. Connect a 1µF ceramic capacitor
between C+ and C−.
A2
C+
Integrated Charge Pump Flying Capacitor Positive Terminal. Connect a 1µF ceramic capacitor
between C+ and C−.
A3
CPOUT
Integrated Charge Pump Output Terminal. Bypass CPOUT to GND with a 1µF ceramic
capacitor.
A4
IN
Input Voltage Connection. Bypass IN to GND with a minimum 2.2µF ceramic capacitor.
B1
SCL
Serial Clock Connection for I²C-Compatible Interface.
B2
SDA
Serial Data Connection for I²C-Compatible Interface.
B3
OVP
Over Voltage Sense Input. Connect OVP to the positive terminal of the inductive boost's output
capacitor (COUT).
B4
GND
Ground
C1
HVLED1
Input Terminal to high-voltage Current Sink #1 (40V max). The boost converter regulates the
minimum of HVLED1 and HVLED2 to 0.4V.
ALS Interrupt Output (INT). When INT Mode is enabled this pin becomes an open-drain output
C2
INT
that pulls low when the ALS changes zones. On power-up, INT Mode is disabled and is high
impedance and must be tied high or low.
C3
PWM
PWM Brightness Control Input for CABC operation. PWM is a high-impedance input and cannot
be left floating.
Drain Connection for the internal NFET. Connect SW to the junction of the inductor and the
C4
SW
Schottky diode anode.
D1
HVLED2
Input Terminal to high-voltage Current Sink #2 (40V max). The boost converter regulates the
minimum of HVLED1 and HVLED2 to 0.4V.
D2
ALS
Ambient Light Sensor Input.
D3
HWEN
Hardware enable input. Drive this pin high to enable the device. Drive this pin low to force the
device into a low power shutdown. HWEN is a high-impedance input and cannot be left floating.
D4
LVLED5 Low-Voltage Current Sink #5
E1
LVLED1 Low-Voltage Current Sink #1
E2
LVLED2 Low-Voltage Current Sink #2
E3
LVLED3 Low-Voltage Current Sink #3
E4
LVLED4 Low-Voltage Current Sink #4
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