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PDF APW8815 Data sheet ( Hoja de datos )
| Número de pieza | APW8815 | |
| Descripción | High-Performance Notebook PWM Controller | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW8815
High-Performance Notebook PWM Controller
Features
General Description
• Adjustable Output Voltage from +0.75V to +5.5V The APW8815 is a single-phase, constant-on-time,
- 0.75V Reference Voltage
synchronous PWM controller, which drives N-channel
- ±1% Accuracy Over-Temperature
MOSFETs. The APW8815 steps down high voltage to
• Operates from An Input Battery Voltage Range of generate low-voltage chipset or RAM supplies in notebook
+1.8V to +28V
computers.
• Power-On-Reset Monitoring on VCC Pin and PVCC The APW8815 provides excellent transient response and
accurate DC voltage output in either PFM or PWM Mode.
Pin
In Pulse Frequency Mode (PFM), the APW8815 provides
• Excellent Line and Load Transient Responses
very high efficiency over light to heavy loads with loading-
• PFM Mode for Increased Light Load Efficiency
modulated switching frequencies. In PWM Mode, the
• Programmable PWM Frequency from 100kHz to converter works nearly at constant frequency for low-noise
500kHz
requirements.
• Integrated MOSFET Drivers
The APW8815 is equipped with accurate positive current-
• Integrated Bootstrap Forward P-CH MOSFET
limit, output under-voltage, and output over-voltage
• Adjustable Integrated Soft-Start and Soft-Stop
protections, perfect for NB applications. The Power-On-
• Selectable Forced PWM or Automatic PFM/PWM Reset function monitors the voltage on VCC and PVCC to
Mode
• Power Good Monitoring
• 70% Under-Voltage Protection
prevent wrong operation during power-on. The APW8815
has a 1.2ms digital soft-start and built-in an integrated
output discharge device for soft-stop. An internal
integrated soft-start ramps up the output voltage with
• 125% Over-Voltage Protection
programmable slew rate to reduce the start-up current. A
• Adjustable Current-Limit Protection
soft-stop function actively discharges the output
- Using Sense Low-Side MOSFET’s RDS(ON)
• Over-Temperature Protection
capacitors.
The APW8815 is available in 14pin TSSOP, 14pin QFN
• TSSOP-14, QFN3.5x3.5-14, and TQFN3x3-16 and 16pin TQFN packages respectively.
Packages
• Lead Free and Green Devices Available
Simplified Application Circuit
(RoHS Compliant)
VCC=5V
EN
VIN
Applications
• Notebook
• Table PC
• Hand-Held Portable
• AIO PC
RTON
ROCSET
PHASE
TON
OCSET
UGATE
PHASE
LGATE
Q1
L
Q2
VOUT
APW8815
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.2 - Apr., 2011
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APW8815
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
VPVCC=5V.
Symbol
Parameter
Test Conditions
APW8815
Min. Typ. Max.
Unit
VCC POR THRESHOLD
VPVCC_THR
VVCC_THR
Rising PVCC POR Threshold
Voltage
Rising VCC POR Threshold
Voltage
4.2 4.35 4.45 V
4.2 4.35 4.45 V
VCC POR Hysteresis
- 100 - mV
CONTROL INPUTS
EN High Threshold
2.5 2.65 2.8
V
Hysterisis
100 175 225 mV
EN Float Threshold
1.37 1.95 2.39
V
EN Low Threshold
0.7 1.0 1.3 V
Hysterisis
150 200 250 mV
EN Leakage
EN = 0V
EN = 5V
- 0.1 1.0
µA
- - 2.0
POWER-OK INDICATOR
VPOK
POK Threshold
IPOK POK Leakage Current
POK Sink Current
POK Debounce Time
POK Enable Delay Time
POK in from Lower (POK Goes
High)
POK Low Hysteresis (POK Goes
Low)
POK out from Normal (POK Goes
Low)
VPOK = 5V
VPOK = 0.5V
EN High to POK High
87 90 93 %
- 3 -%
120 125 130 %
- 0.1 1.0 µA
2.5 7.5
- mA
43 63 85 µs
1.4 2.0 2.6 ms
CURRENT SENSE
IOCSET
IOCSET OCP Threshold
TCIOCSET
IOCSET Temperature
Coefficient
VROCSET
Current-Limit Threshold
Setting Range
Over Current-Limit
Comparator Offset
Zero Crossing Comparator
Offset
PROTECTION
IOCSET Sourcing
On The Basis of 25°C
VOCSET-GND Voltage, Over All
Temperature
(VOCSET-GND-VPGND-PHASE) Voltage,
VOCSET-GND = 60mV
VPGND-PHASE Voltage, EN = 3.3V
9 10 11 µA
-
4500
-
ppm/
oC
30 - 200 mV
-10 0 10 mV
-9.5 0.5 10.5 mV
VUV UVP Threshold
UVP Hysteresis
60 70 80 %
- 3 -%
UVP Debounce Interval
UVP Enable Delay
EN High to UVP Workable
- 16 - µs
1.4 2 2.6 ms
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Apr., 2011
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8815
Pin Description
PIN
NO.
TSSOP-14
QFN3.5x3.5
-14
TQFN3x3
-16
1 1 15
2 2 16
331
442
55
66
77
88
99
10 10
3
4
6
7
8
9
11 11 10
12 12 11
13 13 12
14 14 13
-
Exposed
pad
5,14
NAME
FUNCTION
EN
TON
VOUT
Enable Pin of The PWM Controller. When the EN is above high logic level, the
Device is in automatic PFM/PWM Mode. When the EN is floating, the device is
in force PWM mode. When the EN is below low logic level, the device is in
shutdown and only low leakage current is taken from VCC and VIN.
This Pin is Allowed to Adjust The Switching Frequency. Connect a resistor
RTON=100kΩ ~ 600kΩ from TON pin to PHASE pin.
The VOUT Pin Makes A Direct Measurement of The Converter Output Voltage.
The VOUT pin should be connected to the top feedback resistor at the
converter output.
VCC
Supply Voltage Input Pin for Control Circuitry. Connect +5V from the VCC pin
to the GND pin. Decoupling at least 1µF of a MLCC capacitor from the VCC
pin to the GND pin.
Output Voltage Feedback Pin. This pin is connected to the resistive divider that
FB set the desired output voltage. The POK, UVP, and OVP circuits detect this
signal to report output voltage status.
POK
Power Good Output. POK is an open drain output used to indicate the status of
the output voltage. Connect the POK in to +5V through a pull-high resistor.
GND Signal Ground for The IC
PGND
Power Ground of The LG Low-side MOSFET Driver. Connect the pin to the
Source of the low-side MOSFET.
LGATE
Output of The Low-side MOSFET Driver. Connect this pin to Gate of the
low-side MOSFET. Swings from PGND to VCC.
PVCC
OCSET
PHASE
Supply Voltage Input Pin for The LG Low-side MOSFET Gate Driver. Connect
+5V from the PVCC pin to the PGND pin. Decoupling at least 1µF of a MLCC
capacitor from the PVCC pin to the PGND pin.
Current-Limit Threshold Setting Pin. There is an internal source current 10µA
through a resistor from OCSET pin to GND. This pin is used to monitor the
voltage drop across the Drain and Source of the low-side MOSFET for
current-limit
Junction Point of The High-side MOSFET Source, Output Filter Inductor And
The Low-side MOSFET Drain. Connect this pin to the Source of the high-side
MOSFET. PHASE serves as the lower supply rail for the UG high-side gate
driver.
UGATE
Output of The High-side MOSFET Driver. Connect this pin to Gate of the
high-side MOSFET.
Supply Input for The UG Gate Driver And An Internal Level-shift Circuit.
BOOT Connect to an external capacitor to create a boosted voltage suitable to drive a
logic-level N-channel MOSFET.
NC No Internal Connection
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Apr., 2011
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet APW8815.PDF ] | |
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