- 您现在的位置：买卖IC网 > PDF目录16684 > ISL6124IR-T (Intersil)IC CTRLR PWR SEQUENCE 4CH 24-QFN PDF资料下载
参数资料
| 型号： | ISL6124IR-T |
| 厂商： | Intersil |
| 文件页数： | 20/23页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWR SEQUENCE 4CH 24-QFN |
| 标准包装： | 6,000 |
| 应用： | 电源序列发生器 |
| 电源电压： | 1.5 V ~ 5.5 V |
| 电流 - 电源： | 200µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128, ISL6130
Negative Voltage Sequencing
The ISL612X family can use the charged pump GATE output to
+V
R3
drive FETs that would control and sequence negative voltages
down to a nominal -5V with minimal additional external circuitry.
Figure 24 shows simultaneous turn-on of the 5V bipolar supplies,
and then simultaneous turn-off of the +2.5V and both positive
supplies after the -5V. Figure 25 shows the minimal additional
external circuitry to accomplish this. The 5V zener diode is used
to level-shift the GATE drive down by 5V to prevent premature
R1
R2
VMON
-V
+BIAS
(1k)
ISL6131
OR
ISL6536A PGOOD R4
(15K)
-BIAS
R5
(10k)
R6
Q1 Si1300DL
OR EQUIV.
TO UVLO OF
ISL612X FOR
-V CONTROL AND
SEQUENCING
turn-on when GATE = 0V. Once GATE drive voltage > Vz, then FET
Vgs > 5V, ensuring full turn-on once GATE gets to V DD + 5.3V.
Turn-on and turn-off ramp rates can be adjusted with the FET
gate series resistor value. The -V rail is sequenced normally via
the DLY_X capacitor value, although adjustments in prototyping
should be factored in to fine-tune for actual circuit requirements.
Figures 26 and 27 illustrate a high-accuracy -V detection circuit
using the ISL6131 and a low-cost, low-accuracy -V detection
R1 and R2 define -V UVLO level.
R3 ensures supervisor (ISL6131 or ISL6536A) PGOOD pull-up.
R4 and R5 provide Q1 gate bias between 0V and +V
to 0V (resistor values suitable for -V = -5V and +V = +3.3V).
FIGURE 26. HIGH ACCURACY -V LOCK OUT
+V
circuit, respectively.
R1
TO UVLO OF ISL612X FOR CONTROL
AND SEQUENCING OF -V
R2
-V
Choose R1 and R2 values to drive UVLO
high when -V is sufficiently present.
FIGURE 27. LOW ACCURACY -V PRESENCE DETECTION
Application Considerations
Timing Error Sources
In any system there are variance contributors. For the ISL612x
family, timing errors are mainly contributed by three sources.
Capacitor Timing Mismatch Error
Obviously, the absolute capacitor value is an error source; thus,
FIGURE 24. ±VOLTAGE SEQUENCING
lower-percentage tolerance capacitors help to reduce this error
source. Figure 28 illustrates a difference of 0.57ms between two
DLY_X outputs ramping to DLY_X threshold voltage. These 5%
-V IN
-V OUT
capacitors were from a common source. In applications where
two or more GATEs or LOGIC outputs must have concurrent
transitions, it is recommended that a common GATE drive be
ISL612X GATE
R1
D1
ADDITIONAL 2 COMPONENTS
NECESSARY FOR -V CONTROL
used to eliminate this timing error.
AND SEQUENCING.
D1 necessary to prevent premature turn-on. R1 is used to hold
FET Vgs = 0V until D1 Vz is overcome. R1 value can be changed to
adjust -V ramp rates. Choose an R1 value between 4MW and 10MW
initially, and fine-tune resistor value for the particular need.
FIGURE 25. -VOLTAGE FET DRIVE CIRCUIT
FIGURE 28. CAPACITOR TIMING MISMATCH
20
FN9005.12
September 26, 2012
相关PDF资料 |
PDF描述 |
|---|---|
| RBM08DCAT | CONN EDGECARD 16POS R/A .156 SLD |
| EVAL-ADM3054EBZ | EVAL BOARD FOR ADM3054 |
| ESC06DRXS-S734 | CONN EDGECARD 12POS DIP .100 SLD |
| VE-B14-EW | CONVERTER MOD DC/DC 48V 100W |
| ECC06DRXS-S734 | CONN EDGECARD 12POS DIP .100 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6124IRZA | 功能描述:IC POWER SUPPLY SEQUENCER 24QFN 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) |
| ISL6124IRZA-T | 功能描述:IC POWER SUPPLY SEQUENCER 24QFN 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) |
| ISL6125 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Sequencing Controllers |
| ISL6125 WAF | 制造商:Intersil Corporation 功能描述: |
| ISL6125EVAL1 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Power Sequencing Controllers |
发布紧急采购，3分钟左右您将得到回复。