Microchip HV9967B Manual


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Side 1/14
2020 Microchip Technology Inc. DS20005734A-page 1
HV9967B
Features
3% Accurate LED Current
60V, 0.8Ω Integrated MOSFET
Low Sensitivity to External Component Variation
Single-Resistor LED Current Setting
Fixed Off-Time Control
PWM Dimming Input
Output Short-Circuit Protection with Skip Mode
Overtemperature Protection
Applications
DC/DC or AC/DC LED Drivers
RGB Backlighting Drivers for Flat Panel Displays
General Purpose Constant-Current Source
Signage and Decorative LED Lighting
• Chargers
General Description
The HV9967B is an Average-mode current control LED
driver IC operating in a Constant Off-time mode.
The IC features an integrated 60V, 0.8Ω MOSFET that
can be used as a stand-alone buck converter switch or
connected as a source driver for driving an external
high-voltage Depletion-mode MOSFET. The HV9967B
is powered through its switching output when the
integrated switch is off. Therefore, the same external
MOSFET can be used as a high-voltage linear
regulator for powering the IC.
The LED current is programmed with one external
resistor. The Average-mode current control method
does not produce a peak-to-average error. This greatly
improves the current accuracy as well as the line and
load regulations of the LED current without any need
for loop compensation or direct sensing of the LED
current at a high-voltage potential. The auto-zero circuit
cancels the effects of the input offset voltage and of the
propagation delay of the current sense comparator.
Package Types
8-lead MSOP
(Top view)
8-lead DFN
(Top view)
GND
SW
RSENSE
PGND
PWMD
VDD
AGND
RT
NC
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
SW
RSENSE
PGND
PWMD
VDD
AGND
RT
NC
See Table 2-1 for pin information.
Integrated LED Driver with Average-Mode Current Control


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV9967B

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