参数资料
型号: ISL6161
厂商: Intersil Corporation
英文描述: Octal D-Type Transparent Latches With 3-State Outputs 20-SO -40 to 85
中文描述: 双电源配电控制器
文件页数: 3/10页
文件大小: 224K
代理商: ISL6161
3
Pin Descriptions
PIN #
SYMBOL
FUNCTION
DESCRIPTION
1
12VS
12V Source
Connect to source of associated external N-Channel MOSFET switch to sense output
voltage.
2
12VG
12V Gate
Connect to the gate of associated N-Channel MOSFET switch. A capacitor from this node
to ground sets the turn-on ramp. At turn-on this capacitor will be charged to ~17.4V by a
10
μ
A current source.
3
V
DD
Chip Supply
Connect to 12V supply. This can be either connected directly to the +12V rail supplying the
load voltage or to a dedicated V
DD
+12V supply. If the former is chosen special attention to
V
DD
decoupling must be paid to prevent sagging as heavy loads are switched on.
4
NC
Not Connected
5
ENABLE
Enable / Reset
ENABLE is used to turn-on and reset the chip. Both outputs turn-on when this pin is driven
low. After a current limit time out, the chip is reset by the rising edge of a reset signal applied
to the ENABLE pin. This input has 100
μ
A pull up capability which is compatible with 3V and
5V open drain and standard logic.
6
3VG
3V Gate
Connect to the gate of the external 3V N-Channel MOSFET. A capacitor from this node to
ground sets the turn-on ramp. At turn-on this capacitor will be charged to ~11.4V by a 10
μ
A
current source.
7
3VS
3 Source
Connect to the source side of 3V external N-Channel MOSFET switch to sense output
voltage.
8
3VISEN
3V Current Sense
Connect to the load side of the 3V sense resistor to measure the voltage drop across this
resistor between 3VS and 3VISEN pins.
9
PGOOD
Power Good indicator
Indicates that all output voltages are within specification. PGOOD is driven by an open drain
N-Channel MOSFET. It is pulled low when any output is not within specification.
10
C
TIM
Current Limit Timing
Capacitor
Connect a capacitor from this pin to ground. This capacitor controls the time between the
onset of current limit and chip shutdown (current limit time-out). The duration of current limit
time-out (in seconds) = 200k
x C
TIM
(Farads).
11
C
PUMP
Charge Pump
Capacitor
Connect a 0.1
μ
F capacitor between this pin and V
DD
(pin 3). Provides charge storage for
12VG drive.
12
GND
Chip Ground
13
R
ILIM
Current Limit Set
Resistor
A resistor connected between this pin and ground determines the current level at which
current limit is activated. This current is determined by the ratio of the R
ILIM
resistor to the
sense resistor (R
SENSE
). The current at current limit onset is equal to 10
μ
A x (R
ILIM
/
R
SENSE
). The ISL6161 is limited to a 10k
min. value (OC Vth = 100mV) resistor whereas
the ISL6161 can accommodate a 5k
resistor for a lower OC Vth (50mV).
14
12VISEN
12V Current Sense
Connect to the load side of sense resistor to measure the voltage drop across this resistor.
ISL6161
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