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  Microchip Technology Semiconductor Electronic Components Datasheet  

HV9861A Datasheet

LED Driver

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HV9861A
LED Driver with Average-Mode Constant Current Control
Features
• Fast average current control
• Programmable constant off-time switching
• PWM / linear dimming input
• Output short circuit protection with skip mode
• Ambient operating temperature -40°C to +125°C
• Pin-compatible with the HV9910B and HV9961
Applications
• DC/DC or AC/DC LED driver applications
• LED back-light driver for LCD displays
• General purpose constant current source
• LED signage and displays
• Architectural and decorative LED lighting
• LED street lighting
Description
HV9861A is a patented, average-mode, constant-cur-
rent control, LED driver IC operating in a constant off-
time mode. Unlike the HV9910B, this control IC does
not produce a peak-to-average error, which therefore
greatly improves the accuracy, line and load regulation
of the LED current without any need for loop compen-
sation or high-side current sensing. The output LED
current accuracy is ±3%.
The IC is equipped with a current limit comparator for
hiccup-mode output short circuit protection. Internal
over-temperature protection is provided. The internally
regulated voltage (VDD) for the HV9861A is 7.5V.
The IC can be powered from a 15 - 450V supply. A
PWM dimming input is provided that accepts an exter-
nal control TTL-compatible signal. The output current
can be programmed by an internal 270mV reference,
or controlled externally through a 0 - 1.5V dimming
input.
HV9861A is pin-to-pin compatible with the HV9910B
and HV9961, and can be used as a drop-in replace-
ment for many applications to improve the LED current
accuracy and regulation.
2014 Microchip Technology Inc.
DS20005333A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

HV9861A Datasheet

LED Driver

No Preview Available !

HV9861A
Package Types
VIN 1
CS 2
GND 3
GATE 4
8 RT
7 LD
6 VDD
5 PWMD
VIN 1
NC 2
NC 3
CS 4
GND 5
NC 6
NC 7
GATE 8
16 NC
15 NC
14 RT
13 LD
12 VDD
11 NC
10 NC
9 PWMD
8-Lead SOIC
See Table 2-1 for pin information
Typical Application Circuit
16-Lead SOIC
15VDC to
450VDC
VIN
PWMD GATE
HV9861A
VDD
CS
LD RT
GND
R
T
Sets
RCS LED
Current
LED
Load
DS20005333A-page 2
2014 Microchip Technology Inc.


Part Number HV9861A
Description LED Driver
Maker Microchip
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HV9861A Datasheet PDF






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