Document
AP2001
MONOLITHIC DUAL CHANNEL PWM CONTROLLER
Features
• • • • • • • • • Dual PWM control circuitry Operating voltage can be up to 40V Adjustable Dead Time Control (DTC) Under Voltage Lockout (UVLO) protection Short Circuit Protection (SCP) Variable oscillator frequency: 500KHz Max 2.5V voltage reference output SOP-16L package Lead Free Finish/RoHS Compliant for Lead Free products (Note 1)
General Description
The AP2001 integrates Pulse-width-Modulation (PWM) control circuit into a single chip, mainly designed for power-supply regulator. All the functions included are an on-chip 2.5V reference output, two error amplifiers, an adjustable oscillator, two dead-time comparators, UVLO, SCP, DTC circuitry, and dual common-emitter (CE) output transistor circuit. Recommend the output CE transistors as pre-driver for Driving externally. The DTC can provide from 0% to 100%. Switching frequency can be adjustable by trimming RT and CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit is operating normally.
Applications
• • Backlight inverter DC/DC converts in computers, etc.
Ordering Information
AP 2001 X X X
Package S : SOP-16L
Lead Free L : Lead Free Package (Note 2)
Packing - U : Tube - 13 : Taping
Note:
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Lead-free
Tube Package Packaging Part Number Code (Note 2) Quantity Suffix
S SOP-16L 50 -U
13” Tape and Reel Quantity
2500/Tape & Reel
Part Number Suffix
-13
AP2001S
Note:
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
AP2001 Rev. 2
1 of 8 www.diodes.com
DECEMBER 2006
© Diodes Incorporated
AP2001
MONOLITHIC DUAL CHANNEL PWM CONTROLLER
Pin Assignments
( Top View ) CT RT EA1+ EA1FB1 DTC 1 O UT1 GND
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10
9
R EF SC P EA2+ EA2FB2 DTC 2 O UT2 VCC
SO P-16L
Pin Descriptions
Name CT RT EA+ EA FB DTC OUT GND VCC SCP REF
Description Timing Capacitor Timing Resistor Error Amplifier Input(+) Error Amplifier Input(-) Feedback Loop Compensation Dead Time Control Pre-driver Output Ground Supply Voltage Short Circuit Protection Voltage Reference
AP2001 Rev. 2
2 of 8 www.diodes.com
DECEMBER 2006
© Diodes Incorporated
AP2001
MONOLITHIC DUAL CHANNEL PWM CONTROLLER
Block Diagram
VCC SCP RT CT DTC1
REF
Bandgap Reference
Oscillator
MAX.500KHz
EA1 + EA1 VREF Error Amplifier 1 170K FB1 1.18V EA2+ EA2 Error Amplifier 2 + + R S UVLO R
+ + PWM Amplifier 1
OUT1
+ + PWM Amplifier 2
OUT2
FB2
GND
DTC2
Absolute Maximum Ratings
Symbol VCC VI VO Io TOP TST TLEAD Supply Voltage Amplifier Input Voltage Collector Output Voltage Collector Output Current Operating Temperature Range Storage Temperature Range Lead Temperature 1.6 mm (1/16 inch) from Case for 5 Seconds Parameter Rating 40 20 40 21 -20 to +85 -65 to +150 245 Unit V V V mA.