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参数资料
| 型号： | ISL6121LIBZA |
| 厂商： | INTERSIL CORP |
| 元件分类： | 电源管理 |
| 英文描述： | Single Supply Integrated Current Limiting Controller |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | LEAD FREE, PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 13/16页 |
| 文件大小： | 566K |
| 代理商： | ISL6121LIBZA |
13
FN9005.4
June 10, 2005
Application Implementations
Multiple Sequencer Implementations
In order to control the sequencing of more than 4 voltages,
several of the ISL6123, ISL6124, ISL6125 or ISL6127
devices can be variously configured together to accomplish
this. There may be concerns of a particular implementation
that would make a particular configuration preferable over
another. The fundamental questions to answer to determine
which configuration is best suited for your applications are;
1. What level of voltage assurance is needed prior to
sequencing on and can the voltage supplies be grouped
into high and low criticality
2. Is there a critical maximum time window all supplies must
be present at load or is there a first and a second group
preference possibly with some work done in between the
two groups of voltages being present
Three configurations are described and illustrated here.
In applications where the integrity of critical voltages must be
assured prior to sequencing, additional monitoring of the
critical supplies is needed. If the compliance of the voltage is
critical for either under voltage and or over voltage the
ISL613X family of supervisors can be employed to provide
this additional assurance across multiple sequencers, see
document FN9115 for supervisor data sheet. Figure 17 is a
block diagram of this voltage compliant, high assurance, low
risk configuration showing the ISL613X supervisor and a mix
of FET switched outputs and logic output sequencers
(ISL6124 and ISL6125 ICs).
If the mere presence of some voltage potential is adequate
prior to sequencing on then a small number of standard logic
AND gates can be used to accomplish this. The block
diagram in Figure 18 illustrates this voltage presence
configuration.
In either case the sequencing is straight forward across
multiple sequencers as all DLY_ON capacitors will
simultaneously start charging ~10ms after the common
ENABLE input signal is delivered. This allows the choice of
capacitors to be related to each other no different than using
a single sequencer. When the common enabling signal is
deasserted these configurations will then execute the turn-
off sequence across all sequencers as programmed by the
DLY_OFF capacitor values.
In both cases with all the SYSRST# pins bussed together
once the on sequence is complete simultaneous shutdown
upon any UVLO input failure is assured as SYSRST# output
will momentarily pull low turning off all GATE and LOGIC
outputs.
There may be applications that require or allow groups of
supplies being brought up in sequence and supplies within
each group to be sequenced. Figure 19 illustrates such a
configuration that allows the first group of supplies to turn-on
before the second group starts. This arrangement does not
necessarily preclude adding the assurance of all supplies
prior to turn-on sequencing as previously shown but it will
FIGURE 17. ISL612X & ISL613X VOLTAGE COMPLIANT
SEQUENCING BLOCK DIAGRAM
ISL6125
# N+1
ENABLE#
ISL6124
# N
UVLO
ENABLE#
ISL613Xs
MONITORING
ON ALL RAILS
PGOOD
UVLO
VMON
G
A
T
E
L
O
G
I
C
POWER
SUPPLY
SYSRST#
SYSRST#
en
RESET#
RESET#
RESET#
OE
LOW = RESET
FIGURE 18. MULTIPLE ISL612X USING LOGIC GATES FOR
VOLTAGE PRESENCE DETECT
ISL6125
# N+1
ENABLE#
ISL6124
# N
UVLO
ENABLE#
UVLO
G
A
T
E
L
O
G
I
C
POWER
SUPPLY
SYSRST#
SYSRST#
en
RESET#’
RESET#
RESET#
UVLO
OE
LOW = RESET
ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6121LIBZA-T | Single Supply Integrated Current Limiting Controller |
| ISL6123IR | CAP .39UF 50V PPS FILM ECH-S |
| ISL6124IRZA | CAP CERAMIC .22UF 16V X5R 0402 |
| ISL6125IR | Power Sequencing Controllers |
| ISL6125IRZA | Single Supply Integrated Current Limiting Controller |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6121LIBZA-T | 功能描述:IC SUPPLY/CURR LIMIT CTRLR 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| ISL6123 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Sequencing Controllers |
| ISL6123_07 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Sequencing Controllers |
| ISL6123_11 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Sequencing Controllers |
| ISL6123IR | 功能描述:IC POWER SUPPLY SEQUENCER 24QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
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