HV9989K6-G Supertex, HV9989K6-G Datasheet
HV9989K6-G
Manufacturer Part Number
HV9989K6-G
Description
LED Lighting Drivers 3 CH CCM/DCM BOOST LED DRIVER
Manufacturer
Supertex
Datasheet
1.HV9989K6-G.pdf
(12 pages)
Specifications of HV9989K6-G
Rohs
yes
Input Voltage
10 V to 40 V
Maximum Supply Current
4.5 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-40
Minimum Operating Temperature
0 C
Power Dissipation
4000 mW
Features
Applications
Doc.# DSFP-HV9989
C010913
Typical Boost Application Circuit
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Three out-of-phase constant-current
boost converters
Current loop closed with sub-
microsecond PWM dimming pulses
supports PWM dimming >20kHz
Internal 40V linear regulator
External clock input
External individual reference inputs
Individual PWM dimming inputs
Programmable slope compensation
+0.2A/-0.4A gate drivers
Independent short circuit protection with
hiccup for each channel
Latching output open-circuit protection
LCD panel backlighting
Three-Channel CCM/DCM Boost LED Driver
VIN
VIN_SNS
FLG
VDD
VDD1
VDD2
VDD3
PWMD1
PWMD2
PWMD3
REF1
REF2
REF3
EN
CLK
GND
COMP1
COMP2
COMP3
with Sub-Microsecond PWM Dimming
HV9989
SKIP
SC
GATE1
FDBK1
GATE2
FDBK2
GATE3
FDBK3
GND1
GND2
GND3
OVP1
OVP2
OVP3
FLT1
FLT2
FLT3
CS1
CS2
CS3
General Description
The HV9989 is a three-channel peak current mode PWM controller for driving
single switch converters in a constant output current mode. It can be used for
driving either RGB LEDs or multiple channels of white LEDs.
The HV9989 features Supertex’s proprietary PWM dimming control algorithm
achieving a dimming pulse of a few hundred nanoseconds from a continuous-
conduction mode (CCM) or discontinuous-conduction mode (DCM) boost
converter, while maintaining the instantaneous LED constant current determined
by the external reference voltage input. This feature permits dimming frequency
outside of the audible range. The feature can also yield a wide dimming ratio
in excess of 10,000:1 at low dimming frequency. Each of the three channels
features individual PWM dimming and reference voltage inputs.
The switching frequencies of the three converters are controlled by an external
clock signal, such that the channels operate at a switching frequency of 1/12th
the external clock frequency and are positioned 120
input current ripple.
The HV9989 provides a full protection feature set, including output-short and
open-circuit protection, for each individual channel that is independent from the
other channels.
The HV9989 is powered by a built-in 40V linear regulator.
O
out-of-phase to reduce the
Supertex inc.
www.supertex.com
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