The JW1758B is an offline step-down LED controller designed to regulate constant current directly from high-voltage AC lines without requiring bulky auxiliary circuits.
Function: Offline Step-down LED Controller With PFC and No Auxiliary Winding
Package: SOP 7 Pin Type
Manufacturer: SPMICRO
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Description
The JW1758B is a constant current LED controller with high current accuracy which applies to single stage step-down power factor corrected LED drivers. 600V power MOS is integrated, which can significantly simplify the design of LED lighting system.
JW1758A/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.
Features
1. No auxiliary winding
2. Supplied from line voltage directly
3. 600V high voltage MOSFET integrated
4. High current accuracy of line and load regulation
5. High power factor with low output current-ripple
6. Critical conduction mode
7. High efficiency over wide operating range
8. Cycle-by-cycle current limit
9. LED open protection
10. Inductor short protection
11. ISP short protection
12. Temperature compensation of LED
13. Internal over-temperature protection
Pinout
Absolute Maximum Ratings
1. VCC Voltage: 40V
2. All other pins: -0.3V to 4.5V
3. Junction Temperature: 150°C
4. Lead Temperature: 260°C
5. Storage Temperature: -65°C to +150°C
Applications
- Non-isolation Offline LED driver
- Compact offline LED lighting modules
- Low-cost non-isolated LED power supplies
- Retrofit lighting solutions requiring stable constant current
Alternative / Equivalent Products
- JW1754 series LED controllers
- BP331x LED driver ICs
- HVLED offline step-down controllers from other vendors
- LT3xx LED constant-current offline regulators
JW1758B Datasheet
