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PDF APW7036 Data sheet ( Hoja de datos )
| Número de pieza | APW7036 | |
| Descripción | Advanced Dual PWM Power Controller | |
| Fabricantes | Anpec Electronics | |
| Logotipo |  |
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APW7036
Advanced Dual PWM Power Controller
Features
General Description
• 2 Regulated Voltage are provided
− SYNC Switching Power Internal Reference
Voltage (1.25V , 1.5V , 1.8V and 2.05V)
− ASYNC Switching Power Internal Reference
Voltage (1.5V)
• Simple Single-Loop Control Design
− Voltage-Mode PWM Control
• Excellent Output Voltage Regulation
− SYNC Output : ±1% Over Temperature
− ASYNC Output : ±3% Over Temperature
• Fast Transient Response
− High-Bandwidth Error Amplifier
− Full 0% to 100% Duty Ratio
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
• Small Converter Size
− Constant Frequency Operation(200kHz)
− Programmable Oscillator from 50kHz to 800kHz
− Reduce External Component Count
• 20Pin , SOIC Package
Applications
• High Power 5V to 2.5 or 3.3V DC-DC Regulator
• VGA Card Power Regulation
The APW7036 provides complete power control and
protection for two DC-DC converter optimized in VGA
Card applications. It integrates two PWM controllers ,
as well as the monitoring and protection function into
a single package.
The APW7036 provides simple , single feedback loop
, voltage mode control with fast transient response.
The output voltage of the SYNC converter can be pre-
cisely regulated to as low as VREF (1.25V , 1.5V , 1.
8V and 2.05V) , with a maximum tolerence of ±1.0%
over temperature.
The APW7036 can provides in excess of 14A of out-
put current for an on-board DC/DC converter. It can
monitors all the output voltage , and a single Power
Good signal is issued when the SYNC output is within
±10% of the VREF setting and the ASYNC output lev-
els is above under-voltage levels. Additional built-in
over-voltage protection for the SYNC output uses the
lower MOSFET to prevent output voltage above 115%
of the VREF setting. The PWM controller’s over-cur-
rent function monitor the output current by sensing
the voltage drop across the upper MOSFET’s RDS(ON) ,
eliminating the need for a current sensing resistor .
Pin Description
UGATE
VCC
GATE
PHASE2
PGOOD
OCSET2
FB2
SS
FAULT/RT
NC
1
2
3
4
5
6
7
8
9
10
20 PHASE1
19 LGATE
18 PGND
17 OCSET1
16 VSEN
15 FB1
14 COMP
13 NC
12 GND
11 VAUX
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
www.DataSheet4U.com
Copyright ANPEC Electronics Corp.
1
www.anpec.com.tw
Rev. A.1 - May, 2001
www.DataSheet4U.com
www.DataSheet4U.com
1 page  
APW7036
Functional Pin Description Cont.
(OC) trip point according to the following equation:
I=
PEAK
IOCSET * ROCSET
rDS(ON)
synchronous PWM regulator error amplifier. The FB1
pin is the inverting input of the error amplifier. Simi-
larly , the COMP pin is the error amplifier output. These
pins are used to compensate the voltage-mode con-
trol feedback loop of the synchronous PWM converter.
An over-current trip cycles the soft-start function.
VSEN (Pin 16)
FB2 (Pin 7)
This pin provides the feedback for the non-synchro-
nous switching regulator. A resistor driver is con-
nected from this pin to regulator output and GND that
sets the output voltage. The value of the resistor con-
nected from regulator output to FB2 must be less than
150Ω .
SS (Pin 8)
This pin is connected to the synchronous PWM
converters’s output voltage. The PGOOD and OVP
comparator circuits use this signal to report output
voltage status and for over-voltage protection.
PGND (Pin 18)
This is the power ground connection. Tie the syn-
chronous PWM converter’s lower MOSFET source to
this pin.
Connect a capacitor from this pin to ground. This
capacitor , along with an internal 28µA current source
, sets the soft-start interval of the converter.
FAULT / RT (Pin 9)
LGATE (Pin19)
Connect LGATE to the synchronous PWM converter’s
lower MOSFET gate. This pin provides the gate drive
for the lower MOSFET.
This pin provides oscillator switching frequency
adjustment. By placing a resistor (RT ) from this pin
to GND , the nominal 200kHz switching frequency is
increased. Conversely , connecting a pull-up resistor
(RT ) from this pin to VCC reduces the switching
frequency.
Nominally , the voltage at this pin is 1.26V. In the
event of an over-voltage or over-current condition , this
pin is internally pulled to VCC.
PHASE1 (Pin 20)
Connect the PHASE1 pin to the synchronous PWM
converter’s upper MOSFET source. This pin is used
to monitor the voltage drop across the upper MOSFET
for over-current protection.
VAUX (Pin 11)
The +3.3V input voltage at this pin is monitored for
power-on reset (POR) purposes.
GND (Pin 12)
Signal ground for the IC. All voltage levels are mea-
sured with respect to this pin.
COMP and FB1 (Pins 14 , and 15)
COMP and FB1 are the available external pins of the
Copyright ANPEC Electronics Corp.
Rev. A.1 - May, 2001
5
www.anpec.com.tw
5 Page 
APW7036
Cover Tape Dimensions
Application
SOP- 20
Carrier Width
24
Cover Tape Width
21.3
Customer Service
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Devices Per Reel
1000
Copyright ANPEC Electronics Corp.
Rev. A.1 - May, 2001
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet APW7036.PDF ] | |
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