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参数资料
| 型号： | ISL6121LIB |
| 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： | PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 14/16页 |
| 文件大小： | 566K |
| 代理商： | ISL6121LIB |
14
FN9005.4
June 10, 2005
prevent the turn-on sequence from completing if there is one
unsatisfied UVLO input in a group. Using this configuration
involves waiting through the T
UVLOdel
and T
RSTdel
(total of
~160ms) for each sequencer IC in the chain for the final
RESET# to release. Once ENABLE on the first sequencer is
deasserted all the RESET# outputs will quickly pull low and
thus allow the sequenced turn-off of this configuration to
ripple through several banks as quickly as the user
programmed sequence as chosen by the DLY_OFF
capacitors allow. Once again with common bussed
SYSRTS# pins, simultaneous shut down of all GATEs and
LOGIC down upon an unsatisfied UVLO input is assured
once all FETs or LOGIC output are on.
Voltage Tracking
In some applications the various voltages may have to track
each other as they ramp up & down whereas others may just
need sequencing. In these cases tracking can be
accomplished and has been demonstrated over a wide
range of load current (1A to 10A) and load capacitance
(10μF to 3300μF) with the ISL612X family. Figures 20 and
21 illustrate output voltage ramping tracking performance,
note that differences are less than 0.5V. With the relevant
GATE pins tied together in a star pattern, so that the
resistance between any two GATE pins is equivalent (1K to
10K) results in a sharing of the GATE ramping voltage and
with the same or similar enough FETs this behavior is
observed.
It is suggested that this circuit implementation be prototyped
and evaluated for the particular expected loads prior to
committing to manufacturing build.
Negative Voltage Sequencing
They ISL612X family can use the charged pump GATE
output to drive FETs that would control and sequence
negative voltages down to a nominal -5V with minimal
additional external circuitry. Figure 22 shows turn-on of 5V
bipolar supplies together then the +2.5V and turn-off of both
positive supplies being turned off together after the -5V.
Figure 23 shows the minimal additional external circuitry to
accomplish this. The 5V zener diode is used to level shift the
GATE drive down 5V to prevent premature turn-on when
GATE = 0V. Once GATE drive voltage > Vz then FET Vgs >
5V ensuring full turn-on once GATE gets to VDD+5.3V. Turn-
on and turn-off ramp rate can be adjusted with FET gate
series resistor value. Sequencing of the -V rail is
accomplished as normal via the DLY_X capacitor value
although adjustments in prototyping should be factored in to
fine tune for actual circuit requirements.
FIGURE 19. MULTIPLE ISL612X SERIAL CONFIGURATION
ISL6125
# N+1
ENABLE#
ISL6124
# N
UVLO
ENABLE#
UVLO
G
A
T
E
L
O
G
I
C
POWER
SUPPLY
SYSRST#
SYSRST#
RESET#
RESET#
RESET#
OE
LOW= RESET
ENABLE
RESET#
FIGURE 20. OUTPUT VOLTAGE ON LOW TO HIGH TRACKING
FIGURE 21. OUTPUT VOLTAGE HIGH TO LOW TRACKING
ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128
相关PDF资料 |
PDF描述 |
|---|---|
| ISL612XSEQEVAL1 | Power Sequencing Controllers |
| ISL6128IRZA | Single Supply Integrated Current Limiting Controller |
| ISL6121LIB-T | Single Supply Integrated Current Limiting Controller |
| ISL6124IR | Power Sequencing Controllers |
| ISL6126IRZA | CAP 2.2UF 6.3V CERAMIC X5R 0805 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6121LIB-T | 功能描述:IC SUPPLY/CURR LIMIT CTRLR 8SOIC 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) |
| ISL6121LIBZA | 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) |
| 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 |
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