HV9986K6-G Supertex, HV9986K6-G Datasheet - Page 11

• Manufacturer Part Number: HV9986K6-G
• Description: LED Lighting Drivers 3CH CLSD LOOP SW MD LED DRVR w/EXT RESET
• Manufacturer: Supertex

Specifications of HV9986K6-G

• Factory Pack Quantity: 490

Pin Description
Pin
33
30
36
29
37
28
12
27
26
38
13
25
14
24
10
11
15
16
20
21
17
18
19
#
1
2
3
4
5
6
7
8
9
STATUS1
STATUS2
STATUS3
PWMD1
PWMD2
PWMD3
COMP1
COMP2
COMP3
FDBK1
FDBK2
FDBK3
Name
VDD1
VDD2
VDD3
OVP1
OVP2
OVP3
REF1
REF2
REF3
FLT1
FLT2
FLT3
GND
VDD
RST
CS1
CS2
CS3
VIN
EN
Supertex inc.
Description
These pins are the power supply pins of the three channels. They can either be connected to the VDD
pin or supplied with an external power supply. They must be bypassed with a low ESR capacitor to
their respective GNDs (at least 0.1μF). All VDD pins (VDD, VDD1-3) must be connected together ex-
ternally. An external 5V supply can be connected to these pins to power the IC if the internal regulator
is not used.
These pins are used to drive external logic-level disconnect switches. The disconnect switches are
used to protect the LEDs in case of fault conditions and also serve to provide excellent PWM dimming
response by disconnecting and reconnecting the LEDs from the output capacitor during PWM dim-
ming.
These pins are used to sense the source current of the external power FETs. They include a built-in
100ns (min) blanking timer. Connecting an RC-network at these pins programs the slope compensa-
tion. Refer to the Slope Compensation section for additional information.
Stable closed loop control can be accomplished by connecting a compensation network between each
COMP pin and its respective GND.
These pins are the output current feedback inputs for each channel. They receive voltage signal from
external sense resistors.
The voltages at these pins set the output current level for each channel. Recommended voltage range
for these pins is 0V – 1.25V.
These pins provide the over voltage protection for the three channels. When the voltage at any of
these pins exceeds 1.25V, the HV9986 is turned off. The fault channel cannot be reset until the voltage
drops below 1.125V.
Input of the internal 40V linear regulator.
This pin is the output of the linear regulator. It maintains a regulated 5.0V as long as the voltage of
the VIN pin is between 10V and 40V. It must be bypassed with a low ESR capacitor to GND (at least
0.1μF). This pin can be used as a power supply for the three channels.
When the pin is pulled below 0.8V, then IC goes into a standby mode and draws minimal current.
Ground connection for the common circuitry in the HV9986.
This pin is used to reset the fault channel using an external TTL compatible signal.
These open drain pins are used to indicate a fault on a particular channel.
PWM dimming of the three channels is accomplished by using the PWMD pins. The three pins directly
control the PWM dimming of the three channels and a square wave input should be applied at these
pins
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1235 Bordeaux Drive, Sunnyvale, CA 94089
11
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Tel: [phone]
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www.supertex.com
HV9986