CL88020 datasheet(11/47 Pages) MICROCHIP

11 / 47 page

 2017 Microchip Technology Inc.

DS50002611A-page 11

• Reduced light output ripple (optional)

- An external capacitor with four diodes provides lower light output ripple

- Use of a ceramic capacitor instead of a electrolytic means lamp life can match

the LED lifetime (more than 40,000 hours versus 5,000 hours)

- Provides continuous power to the driver

• Active line regulation

- Active circuitry provides better regulated output power over variations in AC

line voltage

- Between 0% to –12% line regulation typical

- Prevents driver from overheating at high AC line voltages

- Prevents excessive currents at low line

- Provides reasonable line regulation and efficient operation with only 4 taps

• Over temperature protection

- Optional

- An inexpensive external NTC thermistor provides remote temperature sens-

ing. The thermistor may be located in close proximity to the LEDs to provide

nearly direct monitoring of LED temperature.

- OTP is linear (no on/off cycling)

- A widely available, 470 kΩ NTC provides 85°C maximum temperature

- Temperature adjustable via selection of NTC thermistor resistance

• Two current-setting resistors

- Different hold-up and direct AC currents lowers THD and output ripple

- Tap current ratios internally set

- Reduces component count

- Fewer pins

- Simplifies application design

- Single-point current control for reduced EMI

• 8-pin power SOIC

- Higher HV creepage distances

- Pinout arranged to minimize pin-to-pin voltage differentials

- Pinout accommodates single-layer PCB

• Available in a thermally-enhanced 8-Lead SOIC package with heat slug

CL88020 датащи(PDF) 11 Page - Microchip Technology