LC5200 Datasheet, PDF (1/15 Pages) Allegro MicroSystems – LED Drivers

LC5200 Series
LED Drivers
Features and Benefits
▪ Supply voltage, V_BB, 450 V maximum,
25 to 400 V recommended; Note: lowest voltage can vary
depending on LED loads
▪ Output current I_O(max) options:
▫ 0.5 A, LC5205D
▫ 1.0 A, LC5210D
▪ Constant current control circuit:
▫ Fixed off-time PWM constant current control, off-time
adjustable by external components
▫ Externally adjustable output current by input voltage
to REF pin
▪ Output current dimming by external PWM signal; low
signal to TOFF pin shuts off output current, and PWM
signal input to that pin enables dimming
▪ Undervoltage lockout protection (UVLO)
▪ Overcurrent protection (OCP); latched in response to the
short-to-GND condition
▪ Thermal Shutdown protection (TSD); protects IC from
damage due to excess temperature, auto-restart when
temperature drops below threshold
Package: 7-pin DIP
Description
LC5200 series is an off-line LED driver IC which includes
both a main controller integrated circuit (MIC) and a
power MOSFET. Its high voltage capability allows direct
connection to a wide range of supply voltages ranging from
25 to 400 V (recommended). The LC5200 uses constant
current mode to drive LEDs. The package is a standard
8-pin DIP, with pin 7 removed for greater creepage distance
from the supply pin.
Not to scale
48102.002
Functional Block Diagram
VBB
OUT
MIC
Reg
Regulator
UVLO
TSD
Toff
Current
Logic
Gate
Ref
Control
Driver
OCP
GND
Sen