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ANPEC

APW8822 Datasheet Preview

APW8822 Datasheet

System Power PWM Controller

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APW8822/A/B/C
System Power PWM Controller for Notebook Computers with Charge Pump
Features
Simplified Application Circuit
Wide Input voltage Range from 6V to 25V
Provide 5 Independent Outputs with ±1.0% Accu-
racy Over-Temperature
- PWM1 Controller with Adjustable (2V to 5.5V) Out-
put
- PWM2 Controller with Adjustable (2V to 5.5V) Out-
put
VIN
6V~25V
VLDO5
VOUT1
ENILIM1 EN LDO ENILIM2
Q1
LDO5 LDO3
VLDO3
Q3
L1
PWM1 PWM2
L2 VOUT2
Q2
Q4
Charge Pump
- 100mA Low Dropout Regulator (LDO5) with Fixed
C1 D2
D3 C3 D4
VCP
5V Output
- 100mA Low Dropout Regulator (LDO3) with Fixed
D1
C2
C4
3.3V Output
- 270kHz Clock Signal for 15V Charge Pump (Used General Description
VOUT1 as Its Power Supply)
The APW8822/A/B/C integrates dual step-down, constant-
Excellent Line/Load Regulations about ±1.5% Over- on-time, synchronous PWM controllers (that drives dual
Temperature Range
N-channel MOSFETs for each channel) and two low drop-
Built in POR Control Scheme Implemented
out regulators as well as various protections into a chip.
Constant On-Time Control Scheme with Frequency The PWM controllers step down high voltage of a battery
Compensation for PWM Mode
to generate low-voltage for NB applications. The output
Selectable Switching Frequency in PWM Mode
of PWM1 and PWM2 can be adjusted from 2V to 5.5V by
Built-in Digital Soft-Start for PWM Outputs and Soft- setting a resistive voltage-divider from VOUTx to GND.
Stop for PWM Outputs and LDO Outputs
The linear regulators provide 5V and 3.3V output for
Integrated Bootstrap Forward P-CH MOSFET
standby power supply. The linear regulators provide up
High Efficiency over Light to Full Load Range to 100mA output current. When the PWMx output voltage
(PWMs)
is higher than LDOx bypass threshold, the related LDOx
Built-in Power Good Indicators (PWMs)
regulator is shut off and its output is connected to VOUTx
Independent Enable Inputs (PWMs, LDO)
by internal switchover MOSFET. It can save power
70% Under-Voltage and 125% Over-Voltage Protec- dissipation. The charge pump circuit with 270kHz clock
tions (PWM)
Adjustable Current-Limit Protection (PWMs)
driver uses VOUT1 as its power supply to generate ap-
proximately 15V DC voltage.
- Using Sense Low-Side MOSFETs RDS(ON)
Over-Temperature Protection
The APW8822/A/B/C provides excellent transient
response and accurate DC output voltage in either PFM
3mmx3mm Thin QFN-20 (TQFN3x3-20) package
or PWM Mode. In Pulse-Frequency Mode (PFM), the
Lead Free and Green Device Available (RoHS APW8822/A/B/C provides very high efficiency over light
Compliant)
to heavy loads with loading-modulated switching
frequencies. The Forced-PWM Mode works nearly at
constant frequency for low-noise requirements. The
unique ultrasonic mode maintains the switching
frequency above 25kHz, which eliminates noise in
audio application.
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.
1
Rev. A.4 - Feb., 2017
www.anpec.com.tw




ANPEC

APW8822 Datasheet Preview

APW8822 Datasheet

System Power PWM Controller

No Preview Available !

APW8822/A/B/C
General Description (Cont.)
The APW8822/A/B/C is equipped with accurate sourc-
ing and current-limit, output under-voltage output over-
voltage protections, being perfect for NB applications. A
1.4ms (typ.) digital soft-start can reduce the start-up
current. A soft-stop function actively discharges the
output capacitors by the discharge device. The
APW8822/A/B has individual enable controls for each
PWM channels. Pulling both EN1/2 pin low shuts down
the all of outputs unless LDO3 output. The LDO3 and
LDO5 of APW8822A/C are always on standby power.
The APW8822/A/B/C is available in a TQFN3x3-20
package.
Applications
Notebook and Sub-Notebook Computers
Portable Devices
DDR1, DDR2, and DDR3 Power Supplies
3-Cell and 4-Cell Li+ Battery-Powered Devices
Graphic Cards
Game Consoles
Telecommunications
Ordering and Marking Information
APW8822
APW8822A
APW8822B
APW8822C
Assembly Material
Handling Code
Temperature Range
Package Code
Package Code
QB: TQFN3x3-20
Operating Ambient Temperature Range
I : -40 to 85 °C
Handling Code
TR : Tape & Reel
Lead Free Code
L : Lead Free Device G : Halogen and Lead Free Device
APW8822 QB :
APW
8822
XXXXX
XXXXX - Date Code
APW8822A QB :
APW
8822A
XXXXX
XXXXX - Date Code
APW8822B QB :
APW
8822B
XXXXX
APW
APW8822C QB : 8822C
XXXXX
XXXXX - Date Code
XXXXX - Date Code
DEVICE NUMBER
APW8822QBI
APW8822AQBI
APW8822BQBI
APW8822CQBI
ENABLE FUNCTION
EN1/EN2
ENLDO/ENILIM1/ENILIM2
EN1/EN2
EN1/EN2
SKIP MODE
Auto-skip
Auto-skip
Ultra-sonic
Auto-skip
ALWAYS ON-LDO
LDO3
LDO3 & LDO5
LDO3
LDO3 & LDO5
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines Greento mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Copyright © ANPEC Electronics Corp.
2
Rev. A.4 - Feb., 2017
www.anpec.com.tw


Part Number APW8822
Description System Power PWM Controller
Maker ANPEC
PDF Download

APW8822 Datasheet PDF






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