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PDF APW8820 Data sheet ( Hoja de datos )
| Número de pieza | APW8820 | |
| Descripción | System Power PWM Controller | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW8820
System Power PWM Controller for Notebook Computers
Features
General Description
• Built in 2 PWM Controller into single chip
The APW8820 offers a compact power supply solution to
• High Input Battery Voltage Range from 5.5V to 28V provide 2 voltages required by notebook application. The
• Fixed 1.0MHz Switching Frequency for Individual 2 PWM controllers use current-mode scheme with phase
Channel
shift 180 degrees control scheme allow to use MLCC
• Built in Programmable Inductor DCR Sense For output capacitors. The higher fixed 1MHz switching fre-
Inductor Current Sense Function
quency allows to use thin and small filtered components.
• Built in Current Mode Control with fully Support The APW8820 provides good transient response and
accurate DC output voltage in either PSM or PWM Mode.
MLCC Output Capacitor
In Pulse Skipping Modulation Mode (PSM), the APW8820
• Built in 180 degrees Phase Shift Function
provides high efficiency over light to heavy loads with load-
• Built in PWM/PSM/Ultra Sonic PFM (25kHz) Control ing modulated switching frequencies. The unique ultra-
Schemes
sonic mode maintains the switching frequency above
• Built in Internal 5V/175mA and 3.3V/50mA Linear 25kHz, which eliminates noise in audio applications. The
Regulators
APW8820 built in individual enable control input on 2 chan-
• 0.5V Reference Voltage
nels for flexible power sequence adjustment. The power-
• Built in Digital Soft-start
good outputs (SYSPOK) indicate the operating mode of
• Latch Off Mode for Both Channels
the PWMx.
• Over-Temperature Protection
The APW8820 has been equipped with excellent protec-
• Built in SYSPOK Report function for 2 PWM tion functions: Power-on-RESET (POR), over-current pro-
Channels
tection (OCP), over-voltage protection OVP, under-volt-
• Available in TQFN4x4-24 and QFN3x3-20 Package age protection (UVP) and over-temperature protection
• Halogen and Lead Free Available (RoHS Compliant) (OTP) to prevent the device operate under abnormal con-
dition or adjacent pin shortage.
Applications
• NB
The APW8820 is available in TQFN4x4-24 and QFN3x3-
20 package.
Simplified Application Circuit
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 - Dec., 2012
1
www.anpec.com.tw
Free Datasheet http://www.datash
1 page  
APW8820
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over VIN=19V and TA= 25oC.
Symbol
Parameter
Test Conditions
CURRENT SENSE
ICSPx CSPx Pin Input Current
ICSNx CSNx Pin Input Current
BOOTSTRAP SWITCH
VF Forward Voltage
IR Reverse Leakage
CURRENT MODE PWM CONTROL
gm
Error Amplifier
Transconductance (Note 4)
Open-Loop Gain (Note 4)
Open-Loop Bandwidth (Note 4)
FB Input Leakage Current
COMP High Voltage
COMP Low Voltage
COMP Source Current
COMP Sink Current
ENABLE CONTROL
ENLDO Input Voltage
PWM Shutdown Threshold
INTERNAL SOFT-START
TSS Soft-start Interval
SYSPOK CONTROL
SYSPOK Threshold
SYSPOK Propagation Delay
SYSPOK Low Voltage
SYSPOK Leakage Current
PWM5 Fault Detected
RSYSPOK
PWM3 Fault Detected
PROTECTION for PWMx
OVP Rising Threshold
UVP Falling Threshold
IOCSETx
OCSETx Current Source
Over-Temperature Protection
Rising Threshold
VCSPx = 5V
VCSNx = 5V
VLDO5 – VBOOTx-GND, IF = 10mA
VBOOTx-GND = 30V, VPHASEx = 25V, VLDO5 = 5V
VIN=5.5V ~ 28V
RL = 10KΩ, CL =10pF
RL = 10KΩ, CL = 10pF
VFB = 0.8V
VCOMP = 2V
VCOMP = 2V
Shutdown Threshold
Enable Threshold
COMPx Threshold
FB5 and FB3 Rising
FB5 or FB3 Falling
FB5/FB3 Falling & Rising
ISINK=4mA
VSYSPOK=5V
IPWMPOK=5mA (sink)
IPWMPOK=5mA (sink)
Note 4: Grauantee by design, not production test.
APW8820
Min Typ Max
Unit
-100
-
+100
nΑ
-100
-
+100
nΑ
-
0.5 0.8
V
- - 1 µA
- 640 - µA/V
- 80 - dB
- 20 - MHz
- 0.1 1 µA
-3-V
- 0.5 -
V
- 100 -
µA
- 100 -
µA
- - 0.4 V
2.4 -
-V
-
-
0.45
V
- 1 - ms
87 90 93 %
- 5 -%
- 10 - µs
-
0.1 0.2
V
- - 1 µA
90 120 150
Ω
45 60 75 Ω
115 120 125
65 70 75
9 10 11
- 160 -
%
%
µA
oC
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Dec., 2012
5
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
5 Page 
APW8820
Block Diagram
VIN BYP LDO5
LDO3
3.3V
VIN
POR
LDO
4.68V (typ.)
PWM5POK
PWM3POK
SYSPOK
ENLDO
CSN3
CSP3
BOOT3
UGATE3
PHASE3
LGATE3
GND
FB3
COMP3/SD
Q3
LDO5
+
LDO5
+ Slope
Compe
n-sation
Slope
Compe
n-sation
++
LDO5
Gate
Driver
Logic
Control
3
Phase
Shift
Gate
Driver
Logic
Control
5
Q1
LDO5
Q4
Gate
Driver
Error
Amplifier
PWM
Comparator
ICMP
gm 3
Soft-
Start
0.5V
1MHz
Oscill-
ator
PWM
Comparator
ICMP
5
Error
Amplifier
gm
Gate
Driver
Q2
0.5V
Soft-
Start
CSN5
CSP5
BOOT5
UGATE5
PHASE5
LGATE5
GND
FB5
COMP5/SD
0.5V
0.5V
X 1.25
X 0.7
Under-Voltage
Comparator
Over-Voltage
Comparator
Under-Voltage
Comparator
X 0.7
Over-Voltage
Comparator
0.5V
X 1.25
0.5V
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Dec., 2012
11
www.anpec.com.tw
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet APW8820.PDF ] | |
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