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HV9911DB4

Description
LED Lighting Development Tools SWITCH-MODE LED DRIVER IC WITH HIGH CURRENT ACCURACY DEMOBOARD
CategoryDevelopment board/suite/development tools   
File Size665KB,6 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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HV9911DB4 Overview

LED Lighting Development Tools SWITCH-MODE LED DRIVER IC WITH HIGH CURRENT ACCURACY DEMOBOARD

HV9911DB4 Parametric

Parameter NameAttribute value
Product CategoryLED Lighting Development Tools
ManufacturerMicrochip
ProductDemonstration Boards
For Use WithHigh Brightness High Power LEDs
CoreHV9911
Operating Supply Voltage9 V to 16 V
Description/FunctionDrives LED strings
Output Current700 mA
Factory Pack Quantity1
Supertex inc.
HV9911DB4
High Brightness SEPIC LED Driver Demoboard
with High Dimming Ratio and Excellent Current Regulation
General Description
The HV9911DB4 is an LED driver dempboard capable of
driving one to six three-watt LEDs in series from an input of 9.0
- 16VDC. The demoboard uses Supertex’s HV9911 in a SEPIC
topology to drive LED string voltages higher or lower than the
input voltage. The converter has a very good initial regulation
(+/-5%), and excellent line and load regulation over the entire
input and output voltage range (<+/-1%). The full load efficiency
of the converter is typically greater than 85%.
The HV9911DB4 is also protected against open LED and
output short circuit conditions. It is protected against over load
conditions by limiting the input current. It has an excellent PWM
dimming response. The switching frequency of the HV9911DB4
can be synchronized to other HV9911 boards or to an external
350kHz clock by connecting the clock to the SYNC pin of the
HV9911DB4.
Specifications
Parameter
Input voltage (steady state):
Output LED string voltage:
Output current:
Output current ripple:
Switching frequency:
Full load efficiency:
Open LED protection:
Output short circuit protection:
Dimensions
Value
9.0 - 16VDC
3V min - 24V max
700mA +/-5%
5% typical
350kHz
87% (at 13V input)
Shuts down at 30V
Included
56.0mm x 38.2mm
Board Layout and Connection Diagram
V
IN
J1
J2
J3
Actual Size: 56.0mm x 38.2mm
Connections:
Input -
The input is connected between the terminals of
connector J1 as shown in the connection diagram.
Output -
The output is connected between the terminals of
connector J2 as shown.
Enable/PWM Dimming -
To enable the board, short pins
PWMD and V
DD
of connector J3 as shown. To use the PWM
dimming feature of the board, connect an external push-pull
square wave source between terminal PWMD and GND of
connector J3 as shown by the dotted lines.
SYNC:
To synchronize two or more boards, connect the
SYNC pins of all the boards. To synchronize the HV9911DB4
to an external 350kHz clock, connect the clock between
SYNC and GND pins of terminal J3.
Note:
During PWM dimming, V
DD
of connector J3 should be left
open. Also, the PWM signal must have the proper polarity
with the positive connected to PWMD of J3. Note that
GND of J3 is internally connected to the return path of the
input voltage.
Doc.# DSDB-HV9911DB4
A032713
Supertex inc.
www.supertex.com
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