NCP1370: Dimmable Quasi-Resonant Primary Side Current-Mode Controller for LED TV
Backlight
The NCP1370 is a PWM current mode controller targeting isolated
flyback and non−isolated constant current topologies. The controller
operates in a quasi−resonant mode to provide high efficiency. Thanks
to a novel control method, the device is able to precisely regulate a
constant LED current from the primary side. This removes the need
for secondary side feedback circuitry, biasing and an opto−coupler.
The device is highly integrated with a minimum number of external
components. A robust suite of safety protection is built in to simplify
the design. This device supports analog/digital dimming and both
modes can be combined to enhance dimming precision. The NCP1370
has a programmable peak current limit to optimize design
compatibility over a wide range of applications. The controller
features a standby mode with reduced current consumption.
Features- Accurate Primary Side Sensing
- Quasi−resonant Peak Current−mode Control Operation
- Line Feed−forward
- Programmable Cycle−by−Cycle Peak Current Limit
- Analog and/or PWM dimming
- Secondary Diode Short Protection
- VCC Undervoltage and overvoltage protection
- Open and Shorted Output LED Protection
- Brown−out
| Benefits- No opto coupler needed & Current regulation within ± 1%
- High efficiency
- Improved regulation accuracy
- Improved driver reliability
- Increased flexibility for different TV LED dimming technique's
- Avoids overheating in fault condition
- Robust fault handling
- Robust fault handling of common LED system faults
- Robust protection in case of low Ac mains
|
Applications- LED TV's Backlight Controller
| End Products- LED TV's
- LED Power supply
- LED Light Engines
|
Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCP1370ADR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 3 | Tape and Reel | 2500 | $0.3333 |
| NCP1370BDR2G | Active | Pb-free
Halide free | SOIC-8 | 751-07 | 3 | Tape and Reel | 2500 | $0.3333 |
Specifications
| Product | Topology | VI Min (V) | VI Max (V) | VO Max (V) | IO Max (mA) | fSW Typ (kHz) |
|---|
| NCP1370ADR2G | Flyback | 9.4 | 26 | 200 | 3000 | Up to 150 |
| NCP1370BDR2G | Flyback | 9.4 | 26 | 200 | 3000 | Up to 150 |
