ISL6160 Intersil Corporation, ISL6160 Datasheet - Page 3

• Manufacturer Part Number: ISL6160
• Description: InfiniBand +12V Bulk and +5V Auxiliary Power Controller
• Manufacturer: Intersil Corporation

Pin Descriptions
PIN NO.
10
11
12
13
14
1
2
3
4
5
6
7
8
9
DESIGNATOR
VA_ FLTn
VA_OUT
ENABLE
VA_ENn
VB_Ret
VA_Ret
VB_ON
VA_IN
VB_IN
DC-DC
GATE
ISEN
CTIM
ISET
NC
Current Set
Current Sense
External FET Gate
Drive Pin
VB Chip Return
VA Chip Return
VA Bias, Controlled
Supply Input,
Undervoltage Lock-Out
VA enable / disable
NC
Controlled Supply
Output
Over Current Fault
Indicator
VB / Chip Supply
VB Current Regulation
Period
VB_In Power Good
and DC-DC Enable
Signal
VB Sequencer Enable
Control Signal
3
FUNCTION
Connect to the low side of the current sense resistor through the current limiting set resistor.
This pin functions as the current regulation level voltage programming pin.
CR Vth = R
Connect to the more positive end of sense resistor to measure the voltage drop across this
resistor.
Connect to the gate of the external N-Channel MOSFET. A capacitor from this node to
ground sets the turn-on ramp. At turn-on this capacitor will be charged to VB +5V by a 10 A
current source.
Bulk voltage ground
Auxiliary voltage ground
VA_IN provides the chip with +5V bias voltage. At VA < 2.5V, VA control functionality is
disabled, FAULT latch is cleared and floating and VA_OUT is held low.
Connected to VA_Ret through the IB connector, VA is asserted on module when VA_ENn
is low. Cycle to reset after latch-off. POR also resets latch.
Upon an OC condition VA_OUT is current limited to 1A. Current limit response time is within
200 s. VA_Out will remain in current limit for ~10mS before being latched off.
Over current fault indicator. VA_FLTn floats and is disabled until VA >2.5V. This output is
pulled low after the OC time-out period has expired and stays latched until module is
removed.
+12V Chip Supply.
Connect a capacitor from this pin to ground. This capacitor determines the time delay
between an overcurrent event and chip output shutdown (current limit time-out). The
duration of current limit time-out (in seconds) = 93k
Indicates that the VB voltage on ISEN pin is within specification and enables the DC-DC
converter. DC-DC ENABLE is driven by an open drain N-Channel MOSFET and is pulled
low when VB Secondary rail (V
VB_ON is used to control and reset the VB supply to IB module. VB is asserted on, when
VB_ON pin is driven high or is open. After a latch-off VB is reset by a low level signal applied
to this pin. This input has 20 A pull-up capability.
ISET
X 20 A
ISEN
) is not within specification.
DESCRIPTION
x C
TIM
(Farads).