AP2011 PWM Datasheet

AP2011 Datasheet PDF, Equivalent


Part Number

AP2011

Description

Synchronous PWM

Manufacture

Anachip

Total Page 9 Pages
PDF Download
Download AP2011 Datasheet PDF


AP2011
www.DataSheet4U.com
Synchronous PWM with VFC Controller
AP2011
„ Features
- Single 10V to 40V Supply Application
- 1.25V + 2.0% Voltage Reference
- Virtual Frequency ControlTM.
- Fast Transient Response.
- Synchronous Operation for High Efficiency
- Current Limit Function.
- Small Size with Minimum External Components
- Soft Start and Shutdown Functions
- Industrial Temperature Range
- Under Voltage Lockout Function
- SOP-14L Pb-Free Package
„ Applications
- Microprocessor Core Supply
- Low Cost Synchronous Applications
- Voltage Regulator Modules (VRM)
- Networking Power Supplies
- Sequenced Power Supplies
- Telecommunication Power Supplies.
„ Pin Assignments
(Top View)
PGATE 1
14 VREF
VCC 2
13 PHASE
PVCC 3
12 SGND
PDRV 4 AP2011 11 OCSET
PGND 5
10 FB
NGATE 6
9 SS/SHDN
VIN 7
8 CAP
SOP-14L
„ Ordering Information
AP2011 X X
Package
S: SOP-14L
Packing
Blank : Tube
A : Taping
„ General Description
The AP2011 is a low-cost, full featured,
synchronous voltage-mode controller designed for
use in single ended power supply applications
where efficiency is of primary concern.
Synchronous operation allows for the elimination of
heat sinks in many applications. The AP2011 is
ideal for implementing DC/DC converters needed to
power advanced microprocessors in low cost
systems or in distributed power applications where
efficiency is important. Internal level-shift, high-side
drive circuitry, and preset shoot-thru control, allows
the use of inexpensive 1P+1N-channel power
switches.
AP2011’s features include temperature ompensated
voltage reference, Virtual Frequency ControlTM method
to reduce external component count, an internal virtual
frequency 200KHz oscillator, under-voltage lockout
protection, soft-start, shutdown function and current
sense comparator circuitry.
Virtual Frequency Control is a trademark of
PWRTEK, LLC.
„ Pin Descriptions
Pin Name
Pin
No.
Description
PGATE
1 Level shift-gate driver
VCC
2 Internal regulator voltage
PVCC
3 Power VCC
PDRV
4 PMOS Gat driver
PGND
5 Power Ground
NGATE
6
Low side driver output (N
MOSFET)
VIN 7 Chip supply voltage
CAP
8 Charge pump pin
Soft start, a capacitor to
SS/ SHDN
9
ground sets the slow start
time/set low for shutdown
function.
FB 10 Feedback input
OCSET
11
Sets the converter
over-current trip point
SGND
12 Signal Ground
PHASE
13
Input from the phase node
between the MOSFETs
VREF
14 Reference voltage
Anachip Corp
www.anachip.com.tw
Rev. 1.1 Apr 1, 2005
1/9

AP2011
Synchronous PWM Controller
AP2011
„ Block Diagram
GND
VCC
VOLTAGE 1.25V
REFERENCE
VREF
UNDER
+ VOLTAGE
-
INTERNAL
REGULATOR
8V PGATE BIAS
+
-
VIN
CAP
PGATE
OCSET
PHASE
FB
SS/SHDN
ERROR
COMP
+
-
+-
0.3V
VCC
12ua
RQ
S
VIRTUAL FREQ
OSCILLATOR
200kHz
DRVP
CROSS
CURRENT
CONTROL
70uA
PVCC
PDRV
-
0.2V +
2ua
+
0.9V -
QS
QB R
DRVN
NGATE
PGND
Virtual Frequency Control - Patent
Number 6,456,050.
AP2011 FUNCTIONAL BLOCK DIAGRAM
„ Absolute Maximum Ratings
Symbol
VIN
VPHASE
ΘJC
ΘJA
TOP
TST
TLEAD
Parameter
VCC to GND
PHASE to GND
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
Range.
0 to 42
0 to 42
60
150
-40 to +85
-65 to +150
300
Unit
V
V
oC/W
oC/W
oC
oC
oC
Anachip Corp
www.anachip.com.tw
Rev. 1.1 Apr 1, 2005
2/9


Features www.DataSheet4U.com AP2011 Synchronous PWM with VFC Controller „ Features - S ingle 10V to 40V Supply Application - 1 .25V + 2.0% Voltage Reference - Virtual Frequency ControlTM. - Fast Transient Response. - Synchronous Operation for H igh Efficiency - Current Limit Function . - Small Size with Minimum External Co mponents - Soft Start and Shutdown Func tions - Industrial Temperature Range - Under Voltage Lockout Function - SOP-14 L Pb-Free Package „ General Descripti on The AP2011 is a low-cost, full featu red, synchronous voltage-mode controlle r designed for use in single ended powe r supply applications where efficiency is of primary concern. Synchronous oper ation allows for the elimination of hea t sinks in many applications. The AP201 1 is ideal for implementing DC/DC conve rters needed to power advanced micropro cessors in low cost systems or in distr ibuted power applications where efficie ncy is important. Internal level-shift, high-side drive circuitry, and preset shoot-thru control, allows.
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