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LM3639AYFQT データシート(PDF) 2 Page - Texas Instruments

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部品番号 LM3639AYFQT
部品情報  Single Chip 40V Backlight 1.5A Flash LED Driver
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

LM3639AYFQT データシート(HTML) 2 Page - Texas Instruments

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LM3639A
SNVS964 – MARCH 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
Connection Diagram
Figure 1. 20-Bump, 0.4 mm Pitch DSBGA Package
YFQ0020HGA
PIN DESCRIPTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
FLED1
A1
Output
High Side Current Source Output for Flash LED1.
FLED2
B1
Output
High Side Current Source Output for Flash LED2.
Flash LED Boost Output. Connect a 10 µF ceramic capacitor between this
OUTF (x2)
A2/B2
Output
pin GND.
Drain Connection for Internal NMOS and Synchronous PMOS Switches.
SWF (x2)
A3/B3
Output
Connect the Flash LED Boost Inductor to SWF.
GND (x3)
A4/B4/E3
Ground
Power Amplifier Synchronization Input. The TX pin has a 300 k
Ω pull-down
TX
C2
Input
resistor connected to GND.
Active High Hardware Flash Enable. Drive STROBE high to turn on Flash
STROBE
C3
Input
pulse. STROBE overrides TORCH. The STROBE pin has a 300 k
Ω pull-
down resistor connected to GND.
Input Voltage Connection. Connect IN to the input supply, and bypass to
VIN
C4
Input
GND with a 10 µF or larger ceramic capacitor.
SDA
D3
Input
Serial Data Input/Output.
SCL
D2
Input
Serial Clock Input.
EN
C1
Input
Enable Pin. High = Standby, Low = Shutdown/Reset.
Drain Connection for internal NFET. Connect SWB to the junction of the
SWB
E4
Input
backlight boost inductor and the Schottky diode anode.
PWM Brightness Control Input for backlight current control. The PWM pin
PWM
D4
Input
has a 300 k
Ω pull-down resistor connected to GND.
Input Terminal to Backlight LED String Current Sink #1 (40V max). The boost
BLED1
D1
Input
converter regulates the minimum of BLED1 and BLED2 to 400 mV.
Input Terminal to Backlight LED String Current Sink #2 (40V max). The boost
BLED2
E1
Input
converter regulates the minimum of BLED1 and BLED2 to 400 mV.
Over-Voltage Sense Input for Backlight Boost. Connect to the positive
OVP
E2
Input
terminal of (COUTB).
2
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Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: LM3639A


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