|
|
PDF APW8812 Data sheet ( Hoja de datos )
| Número de pieza | APW8812 | |
| Descripción | System Power PWM Controller | |
| Fabricantes | ANPEC | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de APW8812 (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
|
No Preview Available !
APW8812
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 ±1.5% Accu-
racy Over-Temperature
- PWM1 Controller with Adjustable (2V to 5.5V) Out-
put
- PWM2 Controller with Adjustable (2V to 5.5V) Out-
put
- 100mA Low Dropout Regulator (LDO5) with Fixed
5V Output
- 100mA Low Dropout Regulator (LDO3) with Fixed
3.3V Output
- 270kHz Clock Signal for 15V Charge Pump (Used
VOUT1 as Its Power Supply)
General Description
• Excellent Line/Load Regulations about ±1.5% Over- The APW8812 integrates dual step-down, constant-on-
Temperature Range
time, synchronous PWM controllers (that drives dual N-
• ±1%, (±1.5%, 50µA) 2.0V Reference Voltage Output 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.
• Selectable Forced-PWM or Automatic PFM/PWM The PWM controllers step down high voltage of a battery
(with Selectable Ultrasonic Operation)
to generate low-voltage for NB applications. The output
• Constant-On-Time Control Scheme with Frequency of PWM1 and PWM2 can be adjusted from 2V to 5.5V by
Compensation for PWM Mode
setting a resistive voltage-divider from VOUTx to GND.
• Selectable Switching Frequency in PWM Mode
The linear regulators provide 5V and 3.3V output for
• Built-in Digital Soft-Start for PWM Outputs and Soft- standby power supply. The linear regulators provide up
Stop for PWM Outputs and LDO Outputs
to 100mA output current. When the PWMx output voltage
• Integrated Bootstrap Forward P-CH MOSFET
is higher than LDOx bypass threshold, the related LDOx
• High Efficiency over Light to Full Load Range regulator is shut off and its output is connected to VOUTx
(PWMs)
by internal switchover MOSFET. It can save power
• Built-in Power Good Indicators (PWMs)
dissipation. The charge pump circuit with 270kHz clock
• Independent Enable Inputs (PWMs, LDO)
driver uses VOUT1 as its power supply to generate ap-
• 70% Under-Voltage and 125% Over-Voltage Protec- proximately 15V DC voltage.
tions (PWM)
• Adjustable Current-Limit Protection (PWMs)
The APW8812 provides excellent transient response and
accurate DC output voltage in either PFM or PWM Mode.
- Using Sense Low-Side MOSFET’s RDS(ON)
• Over-Temperature Protection
In Pulse-Frequency Mode (PFM), the APW8812 provides
very high efficiency over light to heavy loads with loading-
• 4mmx4mm Thin QFN-24 (TQFN4x4-24A) package modulated switching frequencies. The Forced-PWM
• Lead Free and Green Device Available (RoHS Mode works nearly at constant frequency for low-noise
Compliant)
requirements. The unique ultrasonic mode maintains the
switching frequency above 25KHz, which eliminates
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 - Sep., 2012
1
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
1 page  
APW8812
Electrical Characteristics (Cont.)
Refer to the typical application circuits. These specifications apply over VIN=12V and TA= -40 ~ 85 °C, unless otherwise
specified. Typical values are at TA=25°C.
Symbol
Parameter
Test Conditions
APW8812
Min.
Typ.
Max.
Unit
PWM CONTROLLERS (CONT.)
UGATEx Minimum On-Time
80 110 140 ns
Minimum Ultrasonic SKIP Operating
Frequency
25 37
- kHz
LOW DROUPUT LINEAR REGULATORS (LDO5/LDO3)
LDO5 Output Voltage
LDO3 Output Voltage
VTHBYP5
LDO5 Bypass Threshold for
VOUT1-to-LDO5 Switch On
VOUT1 = GND, 6V < VIN < 25V, 0<
ILDO < 100mA
VOUT2 = GND, 6V < VIN < 25V, 0<
ILDO3 < 100mA
VOUT1 Regulation Voltage Rising
Hysteresis
4.8
3.2
4.55
0.15
5.0
3.33
4.7
0.25
5.2
3.46
4.85
0.3
V
V
V
VTHBYP3
LDO3 Bypass Threshold for
VOUT2-to-LDO3 Switch On
VOUT2 Regulation Voltage Rising 3.05 3.15 3.25
V
Hysteresis
0.1 0.2 0.25
VOUTx-to-LDOx Switch On Resistance VOUTx to LDOx, 10mA
- 1.5 3 Ω
LDOx Current-Limit
VOUTx = GND, LDOx = GND
150 -
- mA
LDOx Discharge On Resistance
- 40 65 Ω
REFFERENCE
REF Output Voltage
IREF = 0A
1.98
2.00
2.02
V
REF Load Regulation
REF Sink Current
ILOAD = 0 to 50µA
REF in Regulation
- 10
10 -
- mV
- µA
CHARGE PUMP CLOCK
VCLKH
VCLKL
High Level Voltage
Low Level Voltage
FCLK Clock Frequency
PWM 1/2 PROTECTIONS
IVCLK = -10mA, LDO5 = 5V, TA = 25oC
IVCLK = 10mA, LDO5 = 5V, TA = 25oC
TA = 25oC
4.84
-
175
4.92
0.06
270
-
0.12
325
V
kHz
Over-Voltage Protection Threshold
VOUTX RIsing
120 125 130 %
Over-Voltage Fault Propagation Delay
Current-Limit Current Source
Delta voltage = 10mV
VILIM = 920mV, TA = 25oC
On the basis of 25 oC
- 1.5 - µs
9.4
10
10.6
µA
- 4500 - ppm/ oC
ILIMx Adjustment Range
Maximum setting voltage
VENILIMx-GND
VENILIMx = 5V, Setting Current-Limit
Threshold
0.7
205
-
250
2V
- mV
Current-limit comparator offset
Zero-Crossing Threshold
(VENILIMx -GND-VPGND-PHASEx),
VENILIMx = 920mV
SKIP# = REF or LDOx, VPGND-PHASE
-8
-5
0
0
8 mV
5 mV
Under-Voltage Protection Threshold
65 70 75 %
Under-Voltage Protection Hysteresis
- 3 -%
Under-Voltage Protection Debounce
Interval
22 32 42 µs
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Sep., 2012
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8812
Typical Application Circuit
µ
µ
µ
Ω
µ
µ
µ
µ
µµ
µ
Ω
µ
µ
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Sep., 2012
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet APW8812.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| APW8811 | System Power PWM Controller | ANPEC |
| APW8812 | System Power PWM Controller | ANPEC |
| APW8813 | (APW8813/A) DDR2 And DDR3 Power Solution Synchronous Buck Controller | ANPEC |
| APW8813A | (APW8813/A) DDR2 And DDR3 Power Solution Synchronous Buck Controller | ANPEC |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |