LED controller, linear + PWM dimming, Vsup 8 ... 60 V, SO-16

Secondary-Side, Micro-Interfaced, Flicker-Free LED Controller with Enhanced PWM and Analog Dimming

Description:
The HV96001 LED driver targets offline lighting applications requiring wide dimming capability. The device is capable of linear dimming and PWM dimming, with the PWM dimming capable of flicker-free dimming down to 0.01% level and lower. The HV96001 is specifically adapted to LED driver designs that accommodate a wide range of the LED
load voltage. The device adjusts the output voltage of the AC to DC conversion stage for maintaining a high conversion efficiency over a wide range of the LED load voltage. It also maintains a precise control over the LED current amplitude, thereby maintaining the consistent color temperature. The adaptability of the device to wide range PWM dimming allows for a stable control of the LED current waveform for PWM dimming pulse widths down to 150 ns and lower. The HV96001 driver IC adjusts the flyback converter output voltage such that the boost converter (BC) operates with a small difference between the boost converter input and output voltage, also referred to as the headroom voltage. Operating the boost converter with a small headroom voltage, or, more or less equivalent, operating with a small voltage step-up ratio allows the boost converter to be physically small and operate at a higher efficiency. The HV96001 includes two feedback regulators, the flyback regulator for control of the flyback output voltage and the boost regulator for control of the LED current amplitude. An optocoupler driver circuit drives the optocoupler, which in turn provides a control signal for driving the control input of the flyback converter.

Features
- Wide Input Voltage Range: 8V to 60V
- Linear (analog) Dimming:
- With wide range of amplitude control of the LED current
- Pulse-Width Modulation (PWM) (digital) Dimming:
- Dims down to 0.01% and lower
- With PWM pulse width lower than 150 ns
- PWM dimming frequency up to 20 kHz
- Flyback Converter:
- With automatic output voltage adjustment for maintaining high system efficiency
- Boost Converter:
- With near zero output voltage ripple for a ripple-free LED current
- 100 Hz/120 Hz ripple rejection
- 200 kHz fixed switching frequency
- SEPIC topology compatible
- VDD Regulator:
- 60V input voltage/5V output voltage
- 10 mA drive for supplying external loads
- Fault Recovery with Auto-Retry Delay Set Using Timing Capacitor
- Undervoltage Detection of:
- VDD voltage
- Supply voltage (Flyback output voltage)
- Overvoltage Detection of:
- LED load voltage (Boost output voltage)
- Overcurrent Detection of:
- Load switch current
- Stuck-at-Zero Detection of:
- DIM input signal
- Short Circuit Protection of Output with Auto-Retry Delay

Applications
- Offline LED lighting applications featuring wide range for PWM dimming and linear dimming.