Diodes AP1694 User Manual

Description

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Diodes Incorporated

P1694

OFFLINE, HIGH PF, HIGH EFFICIENCY DIMMABLE LED DRIVER CONTROLLER

Features

The AP1694 is a high performance AC/DC power factor corrector for

mains dimmable LED driver applications. The device uses Pulse

Frequency Modulation (PFM) technology to regulate output current

while achieving high power factor and low THD. It operates as a BCM

(Boundary Conduction Mode) controller which is good for EMI.

The AP1694 provides accurate constant current (CC) regulation while

removing the opto-coupler and secondary control circuitry. It also

eliminates the need of loop compensation circuitry while maintaining

stability. It can meet the requirement of IEC6100-3-2 harmonic

standard.

The AP1694 features low start-up current, low operation current. It

adopts dynamic base driver control technology and valley on

switching mode to achieve high efficiency. It also has rich protection

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features including over voltage, short circuit, over temperature

protection.

The AP1694 provides the dimmable LED driver with a wide dimmer

compatibility including leading edge and trailing edge dimmer. The

AP1694 can achieve deep dimming down to 1%, while the dimming

curve is compliant with the standard of NEMA SSL6.

The AP1694 is available in SO-8 package.

Pin Assignments

(Top View)

VCC

OUT

GND

SGND

• Primary Side Control for Output Current Regulation without Opto-

coupler

• Boundary Conduction Mode (BCM) Operation to Achieve High-

efficiency

• High PF and Low THD

• High Efficiency without Dimmer

• Wide Range of Dimmer Compatibility

• Dimming Curve Compliant with NEMA SSL6

• Low Start-up Current

• Tight LED Current

• Tight LED Open Voltage

• BJT Transistor Driver

• Dynamic Base Driver Control

• Valley-mode Switching to Minimize the Transition Loss

• Easy EMI

• Internal Protections:

 Under Voltage Lock Out (UVLO)

 Leading-edge Blanking (LEB)

 Output Short Protection

 Output Open Protection

 Over Temperature Protection

• Flexible for Design with Small Form Factor and Very Low BOM

Cost

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

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

Applications

• Mains Dimmable LED Lighting

(SO-8/ M Package)

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.

AP1694

Document number: DS36522 Rev. 2 - 2

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P1694

Typical Applications Circuit

TVS1

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Pin Descriptions

BD1

LED+

R12

SGND

VCC

GND

R10

R11

OUT

AP1694

LED-

Pin Number Pin Name Function

1 NC No connection.

2 RI The initial on time setting resistor.

3 SGND Must connect to GND.

4 CS Primary current sensing.

5 FB The feedback voltage from auxiliary winding

6 GND Ground.

7 OUT Gate driver output.

8 VCC Supply voltage of gate driver and control circuits of the IC.

AP1694

Document number: DS36522 Rev. 2 - 2

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P1694

Functional Block Diagram

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SGND

Tons

Detector

Set Initial Tonp

VcsmaxVcs_valley

Tons

CC_CTRL

TONP_ CTR L

Vdd

Power_EN

Vref

Logic

VCC

Regulator&

Bias

PRO

PFM

Protection

& Latch

CS_OCP

FB_C V FB_OVP VCC_OVP

Driver

OUT

Constant Turn-on

Time Generati on

GND

Absolute Maximum Ratings

Symbol Parameter Rating Unit

VCC

OUT

VCS

VFB

STG

LEAD

PD Power Dissipation (TA = +50°C)

θJA

– ESD (Human Body Model) 2000 V

– ESD (Charged-device Model) ±1000 V

Note: 4. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Power Supply Voltage -0.3 to 35 V

Driver Output Current 150 mA

Voltage at CS to GND -0.3 to 7 V

FB Input Voltage -40 to 10 V

Operating Junction Temperature -40 to +150 °C

Storage Temperature -65 to +150 °C

Lead Temperature (Soldering, 10 sec) +300 °C

Thermal Resistance (Junction to Ambient) 160 °C/W

(Note 4) (@TA = +25°C, unless otherwise specified.)

0.65 W

AP1694

Document number: DS36522 Rev. 2 - 2

3 of 9

www.diodes.com

December 2013

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