AL9910/AL9910A

UNIVERSAL HIGH VOLTAGE HIGH BRIGHTNESS LED

DRIVER

AL9910/AL9910A

Document number: DS 35103 Rev. 2 - 2

2 of 14

www.diodes.com

March 2011

© Diodes Incorporated

Pin Descriptions

Pin Name

SO-8

SO-8EP

Descriptions

1

1

Input voltage

CS

2

2

Senses LED string current

GND

3

3

Device ground

Gate

4

4

Drives the gate of the external MOSFET

PWM_D

5

5

Low Frequency PWM Dimming pin, also Enable input. Internal 100k

Ω pull-down to GND

6

6

Internally regulated supply voltage.

•

7.5V nominal for AL9910 and

•

10V nominal for AL9910A.

Can supply up to 1 mA for external circuitry. A sufficient storage capacitor is used to

provide storage when the rectified AC input is near the zero crossing.

LD

7

7

Linear Dimming by changing the current limit threshold at current sense comparator

8

8

Oscillator control. A resistor connected between this pin and ground sets the PWM

frequency.

EP PAD

N/A

EP

Exposed Pad (bottom). Connect to GND directly underneath the package.

Symbol

Parameter

Ratings

Unit

-0.5 to +520

V

Maximum CS input pin voltage relative to GND

-0.3 to 0.45

V

Maximum LD input pin voltage relative to GND

V

Maximum PWM_D input pin voltage relative to GND

V

Maximum GATE pin voltage relative to GND

V

12

V

SO-8 (derate 6.3mW/

°C above +25°C)

630

mW

SO-8EP (derate at 22mW/°C above 25°C)

2200

mW

Junction Temperature Range

+125

°C

Storage Temperature Range

-65 to 150

°C

ESD HBM

Human Body Model ESD Protection (Note 3)

1500

V

ESD MM

Machine Model ESD Protection (Note 3)

300

V

Notes:

2. Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the

specified terminal.

3. Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when

handling and transporting these devices

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

Input DC supply voltage range

AL9910

15.0

500

V

AL9910A

20.0

500

Ambient temperature range

-40

85

°C

AL9910

10

V

AL9910A

11

Pin PWM_D input low voltage

0

1

V

Pin PWM_D input high voltage

2.4

Notes:

4. When using the AL9910 in isolated LED lamps an auxiliary winding might be used.