FAN5645 Datasheet, PDF (2/10 Pages) Fairchild Semiconductor – Indicator LED Blinker with Single-Wire Interface

Block Diagram
Under-Voltage UVLO
Lockout
Thermal Shutdown ^TSD
Protection
CTRL
VIN
GND
Input edge
detector
& timer
Bandgap
reference
Oscillator
DATA
Ref. current
generator
Control logic
& memory
LED
ON
Output current mirror
LED+
R_SET
ISET
Pin Configuration
Figure 2. Block Diagram
GND 1
6 VIN
LED+ 2
P1
(GND)
5 GND
ISET ³
4 _CTRL
Top View
Figure 3. MLP Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
Name
GND
LED+
ISET
CTRL
GND
VIN
Description
Ground. 0V reference for all voltages.
LED output. Connect to anode of LED.
Current Set. Resistor to GND sets maximum LED current 1:400.
Digital single wire interface. Program STOP/TRAIN/RUN sequences.
Ground. 0V reference for all voltages.
Power input.
© 2006 Fairchild Semiconductor Corporation
FAN5645 • Rev. 1.0.0
2
www.fairchildsemi.com