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ISL6160 の電気的特性と機能

ISL6160のメーカーはIntersil Corporationです、この部品の機能は「InfiniBand +12V Bulk and +5V Auxiliary Power Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL6160
部品説明 InfiniBand +12V Bulk and +5V Auxiliary Power Controller
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL6160 Datasheet, ISL6160 PDF,ピン配置, 機能
TM
Data Sheet
ISL6160
August 2001
File Number 9028
InfiniBand +12V Bulk and +5V Auxiliary
Power Controller
The ISL6160 is designed to address the unique power
requirements of the InfiniBand (IB) industry initiative
providing independent power control of both the VB(bulk)
(+12V) and the VA(auxiliary) (+5V) power rails for a single
port. This device can be implemented in both IB Class I (non
isolated) and Class II (isolated) Power Topology
applications.
The ISL6160, along with an N-Channel power MOSFET and
a minimal number of passive components provides soft
starting ramps of both the VB and VA voltages for an IB
module. It also provides accurate and consistent current
regulated outputs for a determined period of time before
latch-off in the presence of overcurrent (OC) conditions.
In addition the ISL6160 provides the enable signal to the on
module DC-DC converter either upon module insertion to
chassis or from a wake event request.
See Figure 1 for typical application usage.
Ordering Information
TEMP. RANGE
PART NUMBER
(oC)
PACKAGE PKG. NO.
ISL6160IB
ISL6160IB-T
ISL6160EVAL2
-40 to 85 14 Ld SOIC M14.15
-40 to 85 Tape & Reel M14.15
IB Class I Power Topology Evaluation Platform
VB SECONDARY RAIL TO DC-DC
ISET
ISEN
GATE
DC-DC EN
VB_ON
CTIM
TO DC-DC
VBxEN_L
LOCAL PWR EN
(OPT.)
+
VB(ulk)
VB_IN
VB_Ret
VA_Ret
VA_FLTn
VA_ENn
VA_IN
VA_Out
(OPT.)
+ VA(ux)
FIGURE 1. TYPICAL APPLICATION USAGE
Features
• VB Programmable Overcurrent Protection Regulation
Level for 25W and 50W Ports
• Internal Charge Pump Allows the Use of an N-Channel
MOSFET for VB Control
• VB Adjustable Turn-On Ramp
• Soft Start Overcurrent Protection During Turn-On
• Two Levels of VB Overcurrent Detection and Protection
• VA and VB Undervoltage Lock-Outs
• 0.125Integrated Power N-Channel MOSFET VA Switch
• Accurate VA Current Sensing and Limiting (1A)
• Timed Current Regulation Period (VB Optional)
• VA Controlled Turn-On Ramp Time
• 1µs Response Time to VB Secondary Rail Dead Short
Applications
• InfiniBand VB and VA Voltage Control
• -48V and 5V Telecom
Pinout
ISL6160
(14 LEAD SOIC)
TOP VIEW
ISET 1
ISEN 2
GATE 3
VB_Ret 4
VA_Ret 5
VA_IN 6
VA_ENn 7
14 VB_ON
13 DC-DC ENABLE
12 CTIM
11 VB_IN
10 VA_FLTn
9 VA_OUT
8 NC
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, All Rights Reserved

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ISL6160 pdf, ピン配列
ISL6160
Pin Descriptions
PIN NO. DESIGNATOR
FUNCTION
DESCRIPTION
1
ISET
Current Set
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 = RISET X 20µA
2
ISEN
Current Sense
Connect to the more positive end of sense resistor to measure the voltage drop across this
resistor.
3
GATE
External FET Gate
Connect to the gate of the external N-Channel MOSFET. A capacitor from this node to
Drive Pin
ground sets the turn-on ramp. At turn-on this capacitor will be charged to VB +5V by a 10µA
current source.
4
VB_Ret
VB Chip Return
Bulk voltage ground
5
VA_Ret
VA Chip Return
Auxiliary voltage ground
6
VA_IN
VA Bias, Controlled VA_IN provides the chip with +5V bias voltage. At VA < 2.5V, VA control functionality is
Supply Input,
disabled, FAULT latch is cleared and floating and VA_OUT is held low.
Undervoltage Lock-Out
7
VA_ENn
VA enable / disable
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.
8 NC NC
9
VA_OUT Controlled Supply
Upon an OC condition VA_OUT is current limited to 1A. Current limit response time is within
Output
200µs. VA_Out will remain in current limit for ~10mS before being latched off.
10
VA_ FLTn Over Current Fault
Over current fault indicator. VA_FLTn floats and is disabled until VA >2.5V. This output is
Indicator
pulled low after the OC time-out period has expired and stays latched until module is
removed.
11
VB_IN
VB / Chip Supply
+12V Chip Supply.
12
CTIM
VB Current Regulation Connect a capacitor from this pin to ground. This capacitor determines the time delay
Period
between an overcurrent event and chip output shutdown (current limit time-out). The
duration of current limit time-out (in seconds) = 93kx CTIM (Farads).
13
DC-DC
VB_In Power Good Indicates that the VB voltage on ISEN pin is within specification and enables the DC-DC
ENABLE and DC-DC Enable converter. DC-DC ENABLE is driven by an open drain N-Channel MOSFET and is pulled
Signal
low when VB Secondary rail (VISEN) is not within specification.
14
VB_ON
VB Sequencer Enable VB_ON is used to control and reset the VB supply to IB module. VB is asserted on, when
Control Signal
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 20µA pull-up capability.
3


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ISL6160 電子部品, 半導体
ISL6160
shutting down the VB supply. The length of this period is set by
the value of a capacitor between CTIM and VB_RET. See table
2 for CTIM value and resulting l current regulation period.
TABLE 2.
CTIM CAPACITOR
0.001µF
NOMINAL CURRENT REGULATION
PERIOD
93µs
0.01µF
930µs
0.022µF
2ms
0.047µF
4.4ms
0.1µF
9.3ms
NOTE: Nominal time-out period in seconds = CTIM x 93k.
The programmed current level is held until either the OC event
passes or the time out period expires. If the former is the case
then the N-Channel MOSFET is fully enhanced and the CTIM
capacitor is discharged. Once CTIM charges to 1.87V, signaling
that the time out period has expired an internal latch is set
whereby the FET gate is quickly pulled to 0V turning off the N-
Channel MOSFET switch, isolating the faulty load. Monitor the
CTIM pin for an OC latch off indication. This pin will rise rapidly
from 1.9V to VB once the time out period expires. If no CTIM
capacitor is implemented the VB Secondary Rail will
immediately latch-off in an OC event.
The ISL6160 responds to a severe overcurrent load (defined as
a voltage across the sense resistor >150mV over the CR Vth
set point) by immediately, driving the N-Channel MOSFET gate
to 0V in ~1µs. The controlled gate voltage is then ramped up
turning on the N-Channel MOSFET to the programmed current
limit level. This is the start of the time out period.
The VB control circuitry is reset after an OC latch-off
condition by a low level on the VB _ON pin and is turned on
again by the VB_ON pin being driven high.
The DC-DC_EN pin is used to enable an accompanying DC-
DC converter on the IM when the VB Secondary Rail is within
specification. This pin pulls up to VB through a pull-up resistor
when the VISEN is > 10V. This pin can also be used as an
undervoltage (UV) signal as it will pull low once the VISEN falls
below 9.2V. This signal can also be passed to a system
controller chip or used to drive an LED for observation. The
state of this signal does not impact the VB current control
function.
For the VA supply the ISL6160 features fully integrated current
monitoring and regulation, an integrated 125mN-channel
MOSFET power switch (Figure 13.) and a current limited delay
to latch-off for system protection. The current sense and limiting
circuitry sets the CR limit to a nominal 1A, making this device
well suited for the VA requirements. See Figure 14. for current
regulation performance. The ISL6160 provides VA OC fault
notification if needed, accurate current regulation and a
consistent timed latch-off thus isolating and protecting the
voltage bus in the presence of an OC event or short circuit. The
OC event to CR time is inversely related to the OC magnitude,
see Figure 15 and the 12mS time (Figure 16) to latch-off is
independent of thermal condition .
The ISL6160 VA_ENn pin provides on-off control over the
VA_IN supply when VA is greater than 2.5V. The switch is
asserted on and starts the soft start ramp once VA_ENn < 0.8V.
Once the VA is latched off due to an OC condition the
VA_Fltn pin will go low indicating the faulted state to a
control chip, indicator display or alarm.
The ISL6160 VB and VA control circuitries are isolated from
each other, thus there are no sequencing restrictions to be
considered.
Description of ISL6160 Operation in an
InfiniBand Module (IM)
On the IM the ISL6160 is necessarily paired with a DC-DC
converter to convert 12V to a lower usable voltage for the
application circuitry. Figure 2 shows a block diagram of a
complete IM power sequencer and power supply using the
ISL6160 and a HIP6006, single output PWM DC-DC converter.
Upon insertion, the InfiniBand (IB) backplane secondary side
connector sequences connections between the backplane
and the inserted module in the following order:
1. VA_Ret and VB_Ret
2. VA_In and VB_In
3. the 6 InfiniBand Module (IM) control signals and
4. VBx_En_L and IMxPRst due to the staggered lead lengths.
The ISL6160 VA undervoltage lockout feature prevents turn-on
of VA until VA_In > 2.5V. It then enables the VA soft start and
power up. The VA rising voltage output is a current limited ramp
so that both the inrush current and voltage slew rate are limited,
(Figure 18) independent of load. This reduces supply droop
due to surge and eliminates the need for additional external
EMI filters. During operation, once a VA OC condition is
detected the output current is limited to 1A for 12mS to allow
transient conditions to pass. If the IC is still in current limit mode
after the current limit period has elapsed, the output is then
latched off. The VA to the IM circuitry is latched off until reset by
the disconnection and reconnection of the IM from the chassis
backplane.
Once VB_In is connected, it is held off from the VB Secondary
Rail until the ISL6160 VB_On pin is signaled high. This is
accomplished through the exclusive OR of both the VBx_En_L
and the Local_Power_Enable being asserted. At that time the
ISL6160 turns on the VB in a soft start mode protecting the
primary supply rail from sudden in-rush current. During turn-on,
the external gate capacitor of the N-Channel MOSFET (VB
switch) is charged with a 20µA current source resulting in a
programmable ramp (soft start turn-on). An internal charge
pump supplies the gate drive for the 12V VB supply switch
driving the MOSFET gate to VB +5V. Once the VB Secondary
Rail ramps to 10V the DC-DC_En pin is pulled high thus
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共有リンク

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部品番号部品説明メーカ
ISL6160

InfiniBand +12V Bulk and +5V Auxiliary Power Controller

Intersil Corporation
Intersil Corporation
ISL6161

Dual Power Distribution Controller

Intersil Corporation
Intersil Corporation


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