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參數(shù)資料
| 型號(hào)： | APW7095AQDE-TRL |
| 廠商： | ANPEC ELECTRONICS CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, PQCC48 |
| 封裝： | 7 X 7 MM, LEAD FREE, MO-220WKKD-4, QFN-48 |
| 文件頁數(shù)： | 17/23頁 |
| 文件大?。?/td> | 430K |
| 代理商： | APW7095AQDE-TRL |
Copyright
ANPEC Electronics Corp.
Rev. A.4 - Dec., 2008
APW 7095/ A
www.anpec.com.tw
17
Application Information
=
(V)
1.26
(V)
V
1
ln
)
(k
100
(k
62.5
(k
37.5
(F)
C
(S)
ts
)
CIN6
CIN6
C
CIN6
CIN6
V
CIN6
VB(2V)
Error
Amp. 6
37.5k
62.5k
F)
(
C
0.07
(S)
ts
CIN6
m
≈
F)
(
C
1.25
(S)
ts
S
m
≈
(pF)
CT
)
(k
RT
900000
(kHz)
f
OSC
≈
IN1
V
O
Error
Amp. 1
1.25V
R1
R2
1
=
R2
R1
1.25V
(V)
Vo
(2) CH4
R2
R1
1.25V
-
=
(V)
Vo
IN4
V
O
Error
Amp. 4
1.25V
R1
R2
INV
Amp. 4
R3
OUTA4
INA4
(3) CH6
1
=
R2
R1
1.26V
(V)
Vo
CIN6
VB(2V)
Error
Amp. 6
37.5k
62.5k
IN6
V
O
R1
R2
F)
(
C
0.70
(S)
t
SCP
PE
m
=
Soft-Start Interval Settings
The CH6 soft-start time depends on the capacitor CCIN6
and is determined as the following equation:
The soft-start time until CH6 output voltage reaches 95%
of the set voltage is determined as the following equation:
On CH1 to CH5, the soft-start time depending on the
capacitor CS determined as the following equation :
Triangular Oscillator Frequency Setting
The triangular oscillator frequency set by the timing ca-
pacitor (CT) connected to the CT pin and the timing resis-
tor (RT) connected to the RT pin determined as the fol-
lowing equation:
Output Voltage Settings
The output voltage is set by the external resistor-divider
connected with converter output, error amplifier input, and
ground.
(1) CH1 to CH3, CH5
Time Constant Setting for Timer-Latch Short-Circuit
Protection Circuit
The time constant for timer-latch short-circuit protection
is set by the capacitor CSCP and determined as the fol-
lowing equation :
Dead-Time Setting
The dead-time control pin (DTC) is designed to set the
maximum ON duty of the main-side MOSFET. When the
device is set for step-up inverted output based on the
step-up or step-up/down Zeta method or flyback method,
the FB pin voltage may reach and exceed the triangular
wave voltage due to load fluctuation. If this is the case, the
output MOSFET is fixed to a ON duty of 100 %. To prevent
this, set the maximum duty of the output MOSFET. Con-
necting a resistor- divider between VREF, DTC and GND
pins provides a voltage VDTC to DTC pin. When the the
voltage at the DTC pin is higher than the triangular wave
voltage (CT1/2), the output transistor is turned on. The
maximum duty is calculated as the following equation:
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