JW1757A/B/C
Offline Step-down LED Driver
With PFC and High Voltage Current Source
Parameters Subject to Change Without Notice
DESCRIPTION
FEATURES
The JW®1757A/B/C is a constant current LED
driver with high current accuracy which applies to
single stage step-down power factor corrected
LED drivers. High voltage power MOS is
integrated, which can significantly simplify the
design of LED lighting system.
JW1757A/B/C integrates high voltage power
source, and can be supplied by line voltage
directly, and auxiliary winding is not needed.
High accuracy of output current is achieved by
sampling the output current directly. Critical
conduction mode operation reduces the switching
losses and largely increases the efficiency.
JW1757A/B/C has multi-protection functions
which largely enhance the safety and reliability of
the system, including VCC over-voltage
protection, VCC UVLO, LED open protection,
inductor short protection, pulse-by-pulse current
limit, over-temperature protection.
Company’s Logo is Protected, “JW” and “JOULWATT” are Registered
Trademarks of JoulWatt technology Inc.
No auxiliary winding
Supplied from line voltage directly
high voltage power MOSFET integrated
High current accuracy of line and load
regulation
High power factor
Critical conduction mode
High efficiency over wide operating range
Cycle-by-cycle current limit
LED open protection
Inductor short protection
ISP short protection
Internal over-temperature protection
SOP7 and DIP7 package
APPLICATIONS
Non-isolation Offline LED driver
TYPICAL APPLICATION
JW1757A/B/C Rev.0.82
JoulWatt® Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
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