HV9961DB1 Supertex, HV9961DB1 Datasheet

HV9961DB1

Manufacturer Part Number

HV9961DB1

Description

LED Lighting Development Kits 21W UNIV AC LED DRVR DEMOBRD W/AV-MD CTRL

Manufacturer

Supertex

Datasheet

1.HV9961DB1.pdf (5 pages)

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General Description

The HV9961 demoboard is a high-brightness LED driver

employing the patent-pending average-mode constant

current control scheme by Supertex Inc. The power

conversion stage of the HV9961DB1 consists of a diode

bridge rectiﬁer followed by a buck converter operating with

ﬁxed off-time of 20µs.

The HV9961DB1 LED driver features tight regulation of the

LED current within a few milliamps over the entire range

of the input AC line and the output LED string voltage. The

LED current accuracy is almost insensitive to the passive

component tolerances, such as the output ﬁlter inductance

or the timing resistor. The accuracy of the LED current is

mainly determined by the internal 275mV ± 3% reference

voltage of the HV9961 control IC and by the external current

sense resistor tolerance. The output current can be adjusted

down to 60mA using an on-board potentiometer. However,

the accurate current control is only achieved with continuous

conduction of the ﬁlter inductor, i.e. when the LED current is

greater than the inductor ripple current amplitude.

Connection Diagram

Connections

Supertex inc.

high voltage differential probes or

damage to the instrument and/or

isolate the demoboard by using

Do not connect earth-grounded

test instruments. Doing so will

the HV9961DB1. Use ﬂoating

short the AC line, resulting in

Connect the input AC voltage between the AC IN

terminals as shown in the connection diagram.

Connect the LED string between LED+ (anode of

LED string) and LED- (cathode of LED string).

an isolating transformer.

Supertex inc.

Accurate Average-Mode Constant Current Control

21-Watt Universal AC LED Driver Demoboard with

WARNING!!!

●

1235 Bordeaux Drive, Sunnyvale, CA 94089

90-265VAC

50/60Hz

(Note, that the linear dimming input of the HV9961 disables

switching, when its voltage falls below a 200V threshold.

Expect the LED driver to shut off when the LED current falls

below 50 ~ 55mA.)

PWM dimming can be achieved by applying a pulse-width-

modulated square wave signal between the PWMD and

GND pins.

The HV9961DB1 features protection from an output short

circuit condition. Open LED protection is inherent, since the

output ﬁlter capacitor can accept the full rated rectiﬁed AC

line voltage.

Please, note that the demoboard is not CISPR15 compliant.

An additional input EMI ﬁlter circuit is required to make the

board meet conducted electro-magnetic emission limits.

Also, note that:

0 -1.5V for LD function

or leave open

NO SAFETY ISOLATION OF THE LED LOAD

FROM THE AC MAINS VOLTAGE IS PROVIDED!

Connect the PWMD terminal to the VDD terminal

using the jumper provided to enable the LED driver.

The current level can be adjusted by applying 0 -

1.5V between LD and GND. Leave LD ﬂoating to

use the internal current setting.

●

Tel: 408-222-8888

20-60V

350mA

●

www.supertex.com

WARNING!!!

No galvanic isolation.

Dangerous voltages are

present when connected

to the AC line.

HV9961DB1

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HV9961DB1 Summary of contents

Page 1

... The HV9961 demoboard is a high-brightness LED driver employing the patent-pending average-mode constant current control scheme by Supertex Inc. The power conversion stage of the HV9961DB1 consists of a diode bridge rectiﬁer followed by a buck converter operating with ﬁxed off-time of 20µs. The HV9961DB1 LED driver features tight regulation of the LED current within a few milliamps over the entire range of the input AC line and the output LED string voltage ...

Page 2

... PWM Dimming The HV9961DB1 is capable of being PWM dimmed by ap- plying a square wave TTL compatible signal between PWMD and GND terminals. However, since there is no galvanic iso- lation on the board, care must be taken to prevent damage to the PWM dimming source and/or the HV9961DB1. One simple way is to isolate the LED driver from the AC line us- ing an isolation transformer ...

Page 3

... V = 60V V = 60V O O 80% 75% 260 310 ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 3 HV9961DB1 Output Short Circuit Response 240VAC 240VAC 120VAC 120VAC Output Voltage (V) Efficiency 60V 60V 20V 20V 60 110 160 210 260 AC Line Voltage (VAC) ...

Page 4

... Schematic 2.0A 1 AC1 250VAC C4 AC2 2 0.1µF 305VAC Silk Screen Supertex inc. RT1 CL-140 POS C1 0.47µF 47µF 400V NEG 400V ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 4 HV9961DB1 C3 D1 STTH2R06U 4.7mH RL-1292-4700 ● Tel: 408-222-8888 ● www.supertex.com 0.47µF 400V 2 ...

Page 5

... SMD0805 SMD0805 SMD0805 SMD1206 SMD1206 400V, 1.0A single phase diode bridge Universal LED Driver does not assume responsibility for use of devices described, and limits its liability Supertex inc. 5 HV9961DB1 Package Manufacturer Radial Panasonic Radial EPCOS Inc Radial EPCOS Inc Panasonic ECJ-2VB1C104K ...

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