参数资料
型号: APW7057KC-TU
厂商: Anpec Electronics Corporation
英文描述: High Power Step-Down Synchronous DC/DC Controller
中文描述: 高功率降压型同步DC / DC控制器
文件页数: 5/14页
文件大小: 154K
代理商: APW7057KC-TU
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Oct., 2003
APW 7057
www.anpec.com.tw
5
APW7057
Min
Typ
Symbol
Parameter
Test Conditions
Max
Unit
PWM CONTROLLER GATE DRIVERS
UGATE Source
UGATE Sink
LGATE Source
LGATE Sink
T
D
Dead Time
PROTECTION
I
OCSET
OCSET Sink Current
UV
FB
FB Under-Voltage Level
FB Under-Voltage
Hysteresis
SOFT-START AND SHUTDOWN
T
SS
Soft-Start Interval
Shutdown Threshold
OCSET Shutdown
Hysteresis
V
UAGTE
=1V
V
UGATE
=1V
V
LGATE
=1V
V
LGATE
=1V
0.6
7.3
0.6
1.8
50
A
A
nS
V
OCSET
=4.5V
FB falling
34
40
0.5
46
μ
A
V
15
mV
V
OCSET
Falling
2
mS
V
1.25
20
mV
Electrical Characteristics ( Cont.)
Unless otherwise specified, these specifications apply over V
CC
=5V, V
BOOT
=12V and T
A
= 0~70
o
C. Typical
values are at T
A
=25
o
C.
Functional Pin Description
BOOT (Pin 1)
This pin provides the supply voltage to the high side
MOSFET driver. A voltage no greater than 13V can
be connected to this pin as a supply to the driver.
For driving logic level N-channel MOSEFT, a boot-
strap circuit can be use to create a suitable driver’s
supply.
UGATE (Pin 2)
This pin provides gate drive for the high-side
MOSFET.
GND (Pin 3)
Signal and power ground for the IC. All voltage lev-
els are measured with respect to this pin. Tie this
pin to the ground plane through the lowest imped-
ance connection available.
LGATE (Pin 4)
This pin provides the gate drive signal for the low
side MOSFET.
VCC (Pin 5)
This is the main bias supply for the controller and
its low side MOSFET driver. Must be closely
decoupled to GND (Pin 3).
DO NOT
apply a
voltage greater than 5.5V to this pin.
FB (Pin 6)
This pin is the inverting input of the error amplifier
and it receives the feedback voltage from an exter-
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