Diodes AL9910, AL9910A, AL9910-5, AL9910A-5 User Manual

A

Description

L9910/ AL9910A/ AL9910-5/AL9910A-5

UNIVERSAL HIGH VOLTAGE HIGH BRIGHTNESS LED DRIVER

Pin Assignments

IN

(Top View)

1

2

AL9910

3

4

SO-8

(Top View)

1

2

AL9910

3

4

SO-8EP

R

8

OSC

7

LD

V

6

DD

5

PWM_D

R

8

OSC

7

LD

V

6

DD

5

PWM_D

The AL9910/A high voltage PWM LED driver-controller provides an

efficient solution for offline high brightness LED lamps from rectified

line voltages ranging from 85V

external MOSFETs at switching frequencies up to 300kHz, with the

switching frequency determined by a single resistor. The AL9910

topology creates a constant current through the LEDs providing

constant light output. The output current is programmed by one

external resistor and is ultimately determined by the external

MOSFET chosen and therefore allows many low current LEDs to be

driven as well as a few high current LEDs.

The LED brightness can be varied by both Linear and PWM dimming

using the AL9910’s LD and PWM_D pins respectively. The PWM_D

input operates with duty ratio of 0-100% and frequency of up to

several kHz.

The AL9910 can withstand input voltages up to 500V which makes it

very resilient to transients at standard mains voltages. As well as

standard SO-8 package the AL9910 is available in the thermally

enhanced SO-8EP package.

Features

• >90% Efficiency

• Universal Rectified 85 to 277V

• Input Voltage Up to 500V

• Internal Voltage Regulator Removes Start-Up Resistor

 7.5V MOSFET Drive – AL9910

 10V MOSFET Drive – AL9910A

• Tighter Current Sense Tolerance: 5% AL9910-5, AL9910A-5

• Drives LED Lamps with Both High and Low Current LEDs

• LED Brightness Control with Linear and PWM Dimming

• Internal Thermal Protection (OTP)

• Available in SO-8 and SO-8EP Packages

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

up to 277VAC. The AL9910 drives

AC

Input Range

AC

Applications

• LED Offline Lamps

• High Voltage DC-DC LED Driver

• Signage and Decorative LED Lighting

• Back Lighting of Flat Panel Displays

• General Purpose Constant Current Source

V

CS

GND

GATE

V

CS

GND

GATE

AL9910/ AL9910A/ AL9910-5/ AL9910-5A

Document number: DS35103 Rev. 9 - 2

1 of 15

www.diodes.com

May 2014

A

L9910/ AL9910A/ AL9910-5/AL9910A-5

Typical Applications Circuit

C3

D1

VACIN

BR1

C1

C2

V

LD

PWM_D

R

OSC

DD

AL9910/A

R

OSC

V

IN

GND

GATE

CS

Q1

R

D1

SENSE

L1

Pin Descriptions

Name

VIN

SO-8 SO-8EP

Pin Number

1 1

Input Voltage

Function

CS 2 2 Senses LED string and external MOSFET switch current

GND 3 3 Device Ground

Gate 4 4 Drives the gate of the external MOSFET switch.

PWM_D 5 5 Low Frequency PWM Dimming pin, also Enable input. Internal 200kΩ pull-down to GND.

Internally regulated supply voltage.



7.5V nominal for AL9910 and AL9910-5



10V nominal for AL9910A.

VDD

6 6

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 Input. Changes the current limit threshold at current sense comparator and changes the average LED current.

Oscillator Control. A resistor connected between this pin and ground sets the PWM frequency. The devices

R

OSC

8 8

can be switched into constant off time (PFM) mode by connecting the external oscillator resistor between

pin and the gate of the external MOSFET.

R

OSC

EP PAD N/A EP Exposed Pad (bottom). Connect to GND directly underneath the package.

Functional Block Diagram

AL9910/ AL9910A/ AL9910-5/ AL9910-5A

Document number: DS35103 Rev. 9 - 2

2 of 15

www.diodes.com

May 2014

A

L9910/ AL9910A/ AL9910-5/AL9910A-5

Absolute Maximum Ratings (Note 4) (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Ratings Unit

V

Maximum input voltage, VIN, to GND

IN(MAX)

VCS

VLD

V

PWM_D

V

GATE

V

DD(MAX)

Maximum CS input pin voltage relative to GND -0.3 to +0.45 V

Maximum LD input pin voltage relative to GND

Maximum PWM_D input pin voltage relative to GND

Maximum GATE pin voltage relative to GND

Maximum VDD pin voltage relative to GND

Continuous Power Dissipation (T SO-8 (derate 6.3mW/°C above +25°C)

= +25°C)

A

-0.5 to +520 V

-0.3 to (VDD +0.3)

12 V

630 mW

V

SO-8EP (derate at 22mW/°C above 25°C) 2200 mW

TJ

TST

Junction Temperature Range +150 °C

Storage Temperature Range -65 to +150 °C

ESD HBM Human Body Model ESD Protection (Note 5) 1500 V

ESD MM Machine Model ESD Protection (Note 5) 300 V

Notes: 4. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal.

5. 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 (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Min Max Unit

AL9910

V

Input DC Supply Voltage Range

INDC

AL9910-5

AL9910A Al9910A-5

Ambient Temperature Range (Note 6)

TA

AL9910_S

AL9910_SP -40 +105

AL9910

VDD Maximum Recommended Voltage Applied to VDD Pin (Note 7)

AL9910-5

AL9910A AL9910A-5

V

EN(LO)

V

Notes: 6. Maximum ambient temperature range is limited by allowable power dissipation. The Exposed pad SO-8EP with its lower thermal impedance allows the variants using this package to extend the allowable maximum ambient temperature range.

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

Pin PWM_D Input Low Voltage

Pin PWM_D Input High Voltage

EN(HI)

15.0 500

20.0 500

-40 +85

10

12

0 1

2.4

VDD

V

°C

V

AL9910/ AL9910A/ AL9910-5/ AL9910-5A

Document number: DS35103 Rev. 9 - 2

3 of 15

www.diodes.com

May 2014

A

L9910/ AL9910A/ AL9910-5/AL9910A-5

Electrical Characteristics (@T

= +25°C, unless otherwise specified.)

A

Symbol Parameter Conditions Min Typ Max Unit

I

INSD

VDD

I

DD(ext)

UVLO

Shut-Down Mode Supply Current

Internally Regulated Voltage

Current Available for External

V

DD

Circuitry

V

Under Voltage Lockout Threshold V

DD

Pin PWM_D to GND, V

IN

V

IN

l

DD(ext)

V

IN

DD

= V

rising

(Note 6)

IN(MIN)

~500V, (Note 8)

IN(MIN)

= 0, Gate pin open

to 100V (Notes 8 & 9)

IN(MIN)

AL9910 AL9910-5

AL9910A

AL9910 AL9910-5

AL9910A 9 10 11

AL9910 AL9910-5

0.50 1

0.65

1.2

7.0 7.5 8.0

1.0 mA

6.4 6.7 7

mA

V

AL9910A 8 9 10

∆UVLO

V

Under Voltage Lockout Hysteresis V

DD

falling

DD

AL9910 AL9910-5

500

mV

AL9910A 750

R

PWM_D

V

CS(HI)

PWM_D Pull-Down Resistance

Current Sense Threshold Voltage

V

= 5V

PWM_D

Full ambient temperature range (Note 10)

AL9910

AL9910A

AL9910A-5

150 200 250 kΩ

225 250 275

230 255 280

mV

242 255 267

AL9910-5 237.5 250 262.5

V

GATE(HI)

V

GATE(LO)

f

D

t

BLANK

t

DELAY

t

T

Notes: 8. V

9. Also limited by package power dissipation limit, whichever is lower.

10. Full ambient temperature range for AL9910-5S, AL9910AS and AL9910S is -40 to +85°C; for AL9910-5SP, AL9910ASP and AL9910SP is

-40°C to +105°C.

11. Device mounted on FR-4 PCB (25mm x 25mm 1oz copper, minimum recommended pad layout on top. For better thermal performance, larger copper pad for heat-sink is needed.

12. Device mounted on FR-4 PCB (51mm x 51mm 2oz copper, minimum recommended pad layout on top layer and thermal vias to bottom layer ground plane. For better thermal performance, larger copper pad for heat-sink is needed.

GATE High Output Voltage

GATE Low Output Voltage

Oscillator Frequency

OSC

Maximum Oscillator PWM Duty Cycle

MAXhf

Linear Dimming Pin Voltage Range

VLD

Current Sense Blanking Interval

Delay From CS Trip to GATE lo

GATE Output Rise Time

RISE

GATE Output Fall Time

FALL

Thermal Shut Down

TSD

Thermal Shut Down Hysteresis

SDH

Thermal Resistance Junction-to-

θJA

Ambient

Thermal Resistance Junction-to-Case

θJC

for the AL9910 is 15V and for the AL9910A it is 20V.

IN(MIN)

I

= 10mA VDD -0.3

OUT

I

= -10mA

OUT

R

= 1MΩ

OSC

R

= 226kΩ

OSC

= 25kHz, at GATE,

f

PWMhf

CS to GND.

Full ambient temperature range (Note 10), V

= 20V

IN

VCS = 0.45V, VLD = VDD

V

= 20V, VLD = 0.15,

IN

= 0 to 0.22V after T

V

CS

C

= 500pF

GATE

C

= 500pF

GATE

BLANK

0 0.3 V

20 25 30

80 100 120

100 %

0

160 250 440 ns

300 ns

30 50 ns

150

50

SO-8 (Note 11) 110

SO-8EP (Note 12) 66

SO-8 (Note 11)

22

SO-8EP (Note 12) 9

VDD

-

250 mV

V

kHz

°C

°C/W

AL9910/ AL9910A/ AL9910-5/ AL9910-5A

Document number: DS35103 Rev. 9 - 2

4 of 15

www.diodes.com

May 2014

A

5

Typical Characteristics

3.0

2.5

2.0

L9910/ AL9910A/ AL9910-5/AL9910A-5

460

440

V = 400V

420

IN

1.5

1.0

0.5

0.0

-0.5

CURRENT SENS E THRESHOLD (mV)

-1.0

-1.5

-40 -15 10 35 60 85 AMBIE NT TEMP ER ATURE (°C)

Change in Current Sense Thresho ld vs. Ambient Temperatu re

100

I = 281mA

LED

90

V = 264V

IN

T = 23.5C

A

80

70

60

50

OUT MAX

I (%)

40

30

20

10

0

050

100 150 200 250 300

V DIMMING CONTROL (mV)

LD

I vs. V Dimming Control

OUT MAX LD

1.

400

V = 15V

IN

380

360

340

INPUT CURRENT (µA)

320

300

280

-40 -15 10 35 60 85 AMBIEN T TE MPE RATURE ( C)

°

Input Current vs. Ambient Temperatu re

450

I = 180mA

LED(NOM )

400

350

300

250

200

SHORT CIRCUIT OUTPUT CURRE NT (mA)

150

85 10 5 12 5 145 165 185 205 22 5

I NPUT V OLTAG E (V )

RMS

180mA LED Driver Short Ci rcu it Out put Current vs. I nput Voltage

245 26 5

1.0

0.5

0.0

R = 226k

OSC

Ω

-0.5

R = 1M

Ω

OSC

-1.0

CHANGE IN FREQUENCY (%)

-1.5

-2.0

-40 -15 10 35 60 85 AMBIE NT TEMPER ATURE ( °C)

Chan ge in Os cill ation Frequency vs. Ambie nt Temp erature

AL9910/ AL9910A/ AL9910-5/ AL9910-5A

Document number: DS35103 Rev. 9 - 2

5 of 15

www.diodes.com

May 2014