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SS9176CS-6TR датащи(PDF) 6 Page - Silicon Standard Corp.

номер детали SS9176CS-6TR
подробное описание детали  Dual Synchronous DC/DC Controllers With Current Sharing Circuitry
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производитель  SSC [Silicon Standard Corp.]
домашняя страница  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

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SS9175/6
PIN DESCRIPTIONS
Pin No.
Symbol
Function
Description
1 (1)
PWRGD
Power-good
Output of the error amplifier and input to the PWM comparator. It is used for feedback
loop compensation.
2 (2)
IN1
Feedback
Inverting input of the error amplifier. It is normally connected to the switching power
supply output through a resistor divider.
3 (3)
COMP1
Compensation
Output of the error amplifier and input to the PWM comparator. It is used for feedback
loop compensation.
4 (4)
VCC
Power Supply
Supply voltage input.
5
CL1+
Over-current
Over-current adjustment and high-side MOSFET supply voltage sense pin. Connect
a resistor from this pin to high-side supply voltage.
6
CL1-
Over-current
Over-current sense pin.
7 (5)
BST1
Boost supply
Supply for high-side driver. Connect to bootstrap circuit.
8 (6)
DH1
High-side drive
High-side MOSFET gate driver pin.
9 (7)
DL1
Low-side drive
Low-side MOSFET gate driver pin.
10 (8)
PGND
Driver ground
Driver circuit GND supply. Connect to MOSFET’s GND.
11 (9)
BSTC
Buffered supply
Voltage supply for internal low-side driver circuit and for high-side bootstrap circuit’s
diode input. Its output is 6V if chip supply voltage VCC > 6.5V. If VCC < 6.5V, then BSTC
= VCC. Need a 10uF decoupling capacitor connected to PGND.
12 (10)
DL2
Low-side drive
Low-side MOSFET gate driver pin.
13 (11)
DH2
High-side drive
High-side MOSFET gate driver pin.
14 (12)
BST2
Boost supply
Supply for high-side driver. Connect to bootstrap circuit.
15 (13)
CL2-
Over-current
Over-current sense pin.
16 (14)
CL2+
Over-current
Over-current adjustment and high-side MOSFET supply voltage sense pin. Connect a
resistor from this pin to high-side supply voltage.
17 (15)
SS/EN
Soft-start/Enable
A 25uA internal current source charges an external capacitor for soft start. Pull down this
pin to disable the chip.
18
COMP2
[NC]
Compensation
Output of the error amplifier and input to the PWM comparator. It is used for feedback
loop compensation.
19
IN2 [NC]
Feedback
Inverting input of the error amplifier. It is normally connected to the switching power
supply output through a resistor divider.
20 (16)
GND
Control ground
Control circuit GND supply.
Note: Inside ( ) is the pin assignment for SS9176CS. Inside [ ] is for SS9175CS.
PIN CONFIGURATIONS
PWRGD
PGND
DL1
DH1
BST1
CL1+
CL1
VCC
COMP1
IN1
1
10
9
8
7
6
5
4
3
2
20
11
12
13
14
15
16
17
18
19
SS/ENB
IN2
GND
BSTC
DL2
DH2
BST2
CL2-
CL2+
COMP2
SS/ENB
PGND
DL1
DH1
BST1
PWRGD
VCC
COMP
IN
GND
BSTC
DL2
DH2
BST2
CL2-
CL+
10
9
11
12
13
14
15
16
1
8
7
6
5
4
3
2
SS9175
SS9176
Rev.2.02 12/29/2003
PRELIMINARY


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