HV9911DB4 Supertex, HV9911DB4 Datasheet

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HV9911DB4

Manufacturer Part Number
HV9911DB4
Description
Manufacturer
Supertex
Datasheet
1.HV9911DB4.pdf (6 pages)

Specifications of HV9911DB4

Lead Free Status / Rohs Status
Not Compliant
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.
Board Layout and Connection Diagram
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
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.
Supertex inc.
with High Dimming Ratio and Excellent Current Regulation
Supertex inc.
DD
High Brightness SEPIC LED Driver Demoboard
of connector J3 as shown. To use the PWM
Actual Size: 56.0mm x 38.2mm
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
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
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.
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
V
IN
●
Tel: 408-222-8888
J1
J3
DD
●
of connector J3 should be left
www.supertex.com
HV9911DB4
Shuts down at 30V
87% (at 13V input)
56.0mm x 38.2mm
3V min - 24V max
700mA +/-5%
9.0 - 16VDC
5% typical
J2
Included
350kHz
Value

HV9911DB4 Summary of contents

Page 1

... Output short circuit protection: Dimensions V IN 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 open. Also, the PWM signal must have the proper polarity with the positive connected to PWMD of J3 ...

Page 2

... LED current reaches a steady state, unplug one end of the LED string from the demoboard. The output voltage will rise to about 30V and the HV9911DB4 will shut down. To restart the converter, disconnect and reconnect the input voltage (recycle the power to the board). ...

Page 3

... Normal Operation: The drain voltage of the switching FET and the output current are shown in Fig.5. It can be seen that the converter is switching at 350kHz, and the output current ripple is about 16% (peak to peak). Fig.5. Switching waveforms for the HV9911DB4 Output Current Drain voltage 4. Open LED Protection: Open LED protection for the circuit is set at 30V ...

Page 4

... The ripple current is about 4% (peak to peak). Silk Screen Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 4 HV9911DB4 Fig. 10. Response of the HV9911DB4 to an input voltage change (Time Scale: 1ms/div) Input Voltage LED Current ● Tel: 408-222-8888 ● ...

Page 5

... Circuit Schematic: Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 5 HV9911DB4 ● Tel: 408-222-8888 ● www.supertex.com ...

Page 6

... SMD2512 SMD0805 SMD0805 SMD2010 SMD0805 SMD0805 SMD0805 SMD1206 SO-16 Supertex does not assume responsibility for use of devices described, and limits its liability Supertex inc. Supertex inc. 6 HV9911DB4 Manufacturer’s Part Number C3225X7R1E225K C1210C105K5RACTU C3225X7R1H225K C2012X7R1C105K GRM219R71C104KA01D - - C0805C471K5RACTU C0805C102K5RACTU SK38-TP S2B-EH S4B-EH ...