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PDF APW8816 Data sheet ( Hoja de datos )
| Número de pieza | APW8816 | |
| Descripción | Single Buck PWM Controller | |
| Fabricantes | ANPEC | |
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APW8816
Single Buck PWM Controller With Linear Regulator
Features
General Description
PWM Controller
• Adjustable Output Voltage from +0.75V to +3.3V
- 0.75V Reference Voltage
- ±1% Accuracy Over-Temperature
• Operates from An Input Battery Voltage Range of
+3V to +28V
• Power-On-Reset Monitoring on VCC Pin and PVCC
Pin to Avoid Wrong Sequence
• Excellent Line and Load Transient Responses
• PFM Mode for Increased Light Load Efficiency
• Programmable PWM Frequency from 100kHz to
500kHz
• Integrated MOSFET Drivers
• Integrated Bootstrap Forward P-CH MOSFET
• Integrated Soft-Start
• Selectable Forced PWM or Automatic PFM/PWM
Mode
• Power Good Monitoring
• 70% Under-Voltage Protection
• 125% Over-Voltage Protection
• Adjustable Current-Limit Protection
- Using Sense Low-Side MOSFET’s RDS(ON)
• Over-Temperature Protection
LDO Controller
• 0.75V Reference Voltage with 1.5% Accuracy Over
Temperature
• Independent Enable and Power OK Function
• 50% Under-Voltage Protection
• Integrated Soft-Start Function
• TQFN-16 3x3 package
• Lead Free and Green Device Available (RoHS
Compliant)
The APW8816 is a single-phase, constant on-time,
synchronous PWM controller with linear regulator, which
drives N-channel MOSFETs. The APW8816 steps down
high voltage to generate low-voltage chipset or RAM
supplies in notebook computers.
The APW8816 provides excellent transient response and
accurate DC voltage output in either PFM or PWM Mode.
In Pulse Frequency Mode (PFM), the APW8816 provides
very high efficiency over light to heavy loads with loading-
modulated switching frequencies. In PWM Mode, the
converter works nearly at constant frequency for low-noise
requirements.
The APW8816 is equipped with accurate positive current
limit, output under-voltage, and output over-voltage
protections, perfect for various applications. The Power-
On-Reset function monitors the voltage on VCC and PVCC
to prevent wrong operation during power-on. The
APW8816 has a 1.5ms digital soft start and built-in an
integrated output discharge device for soft stop. An internal
soft-start ramps up the output voltage with programmable
slew rate to reduce the start-up current. A soft-stop function
actively discharges the output capacitors.
The integrated linear regulator could drive an external N-
Channel MOSFET and provides an adjustable output by
using an external resistive divider. It is easy to be used
because there is independent enable function and power
OK indicator at linear regulator part. Moreover, linear
regulator has soft start, under-voltage and over-
temperature protection to become the great second
output voltage of the APW8816.
The APW8816 is available in 16pin TQFN packages
respectively.
Applications
• Notebook
• Table PC
• Hand-Held Portable
• AIO PC
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.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Apr., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APW8816
Electrical Characteristics (Cont.)
These specifications apply for T =-40°C to +85°C, unless otherwise stated. All typical specifications T =+25°C, V =5V,
A A CC
V =5V.
PVCC
Symbol
Parameter
CONTROL INPUTS
EN High-Level Input Voltage
EN Float Voltage
EN Low-Level Input Voltage
Hysteresis
EN Leakage
POWER-OK INDICATOR
VPOK POK Threshold
IPOK POK Leakage Current
POK Sink Current
POK Out Debounce Time1
POK Out Debounce Time2
POK Enable Delay Time
CURRENT SENSE
IOCSET
TIOCSET
IOCSET OCP Threshold
IOCSET Temperature
Coefficient
Test Conditions
APW8816
Min. Typ. Max.
Unit
EN=5V
2.9 -
-V
1.61 1.9 2.19
V
- - 0.8 V
350 400 450 mV
- 0.1 1.0 µA
POK in from Lower (POK Goes
High)
87 90 93 %
POK out from Normal high threshold
(POK Goes Low)
120
125
130
%
VPOK=5V
- 0.1 1.0 µA
VPOK=0.5V
1.25 7.5
- mA
When enter high threshold
- 3 - µs
When run away 90%
- 20 - µs
From EN High to POK High
- 4.5 - ms
IOCSET Sourcing
On The Basis of 25°C
18 20 22 µA
- 4700 - ppm/ oC
VROCSET
Current Limit Threshold
Setting Range
VOCSET-GND Voltage, Over All
Temperature
60 - 650 mV
Over current Limit
Comparator Offset
Zero Crossing Comparator
Offset
PROTECTION
VUV UVP Threshold
UVP Debounce Interval
UVP Enable Delay
VOVR
OVP Rising Threshold
TOTR
OVP Propagation Delay
OTP Rising Threshold (Note 5)
OTP Hysteresis (Note 5)
(VOCSET-PHASE-VGND-PHASE) Voltage,
VOCSET-PHASE=200mV
VGND-PHASE Voltage, EN=3.3V
EN high to UVP workable
VFB Rising, Over voltage=10mV
-10 0
-5 0
10 mV
5 mV
60 70 80 %
- 20 - µs
- 4.5 - ms
120 125 130
%
- 3 - µs
- 155 - oC
- 10 - oC
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Apr., 2013
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8816
Operating Waveforms
Refer to the typical application circuit. The test condition is VIN=19V, TA= 25oC unless otherwise specified.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Apr., 2013
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet APW8816.PDF ] | |
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