参数资料
| 型号： | ISL6742AAZA-T |
| 厂商： | Intersil |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM/VM 16-QSOP |
| 标准包装： | 1 |
| PWM 型： | 电流/电压模式 |
| 输出数： | 4 |
| 频率 - 最大： | 2MHz |
| 占空比： | 100% |
| 电源电压： | 9 V ~ 16 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 剪切带 (CT) |
| 其它名称： | ISL6742AAZA-TCT |
ISL6742
Typical Performance Curves
1.02
1.01
25
24
23
22
1.00
21
0.99
20
19
0.98
-40
-25
-10
5
20
35
50
65
80
95
110
18
0
200
400
600
800
1000
TEMPERATURE (°C)
FIGURE 1. REFERENCE VOLTAGE vs TEMPERATURE
1?10 4
1?10 3
CT =
1000pF
680pF
RTD CURRENT (μA)
FIGURE 2. CT DISCHARGE CURRENT GAIN vs RTD CURRENT
1?10 3
100
100
470pF
10
0
10
20
30
40 50 60
70
80
330pF
220pF
100pF
90
100
10
0.1
1
RTD=
10k Ω
50k Ω
100k Ω
10
RTD (k Ω )
FIGURE 3. DEADTIME (DT) vs CAPACITANCE
Pin Descriptions
VDD - VDD is the power connection for the IC. To optimize
noise immunity, bypass VDD to GND with a 0.1μF or larger
high frequency ceramic capacitor as close to the VDD and
GND pins as possible.
VDD is monitored for supply voltage undervoltage lock-out
(UVLO). The start and stop thresholds track each other
resulting in relatively constant hysteresis.
GND - Signal and power ground connections for this device.
Due to high peak currents and high frequency operation, a
low impedance layout is necessary. Ground planes and
short traces are highly recommended.
VREF - The 5V reference voltage output having 3%
tolerance over line, load and operating temperature. Bypass
to GND with a 0.1μF to 2.2μF low ESR capacitor.
CT - The oscillator timing capacitor is connected between
this pin and GND. It is charged through an internal 200μA
current source and discharged with a user adjustable current
source controlled by RTD.
8
CT (nF)
FIGURE 4. CAPACITANCE vs FREQUENCY
RTD - This is the oscillator timing capacitor discharge
current control pin. The current flowing in a resistor
connected between this pin and GND determines the
magnitude of the current that discharges CT. The CT
discharge current is nominally 20x the resistor current. The
PWM deadtime is determined by the timing capacitor
discharge duration. The voltage at RTD is nominally 2V. The
minimum recommended value of RTD is 2.00k Ω .
CS - This is the input to the overcurrent comparator and the
average current sample and hold circuit. The overcurrent
comparator threshold is set at 1V nominal. The CS pin is
shorted to GND at the termination of either PWM output.
Depending on the current sensing source impedance, a
series input resistor may be required due to the delay
between the internal clock and the external power switch.
This delay may result in CS being discharged prior to the
power switching device being turned off.
OUTA and OUTB - These paired outputs are the pulse width
modulated outputs for controlling the switching FETs in
alternate sequence.
FN9183.2
October 31, 2008
相关PDF资料 |
PDF描述 |
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| ISL6744AABZ | IC REG CTRLR PWM VM 8-SOIC |
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| ISL6745AU-T | IC REG CTRLR PWM VM 10-MSOP |
| ISL6752AAZA-T | IC REG CTRLR PWM CM 16-QSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6744AABZ | 功能描述:IC REG CTRLR PWM VM 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6744AABZ-T | 功能描述:IC REG CTRLR PWM VM 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6744AAUZ | 功能描述:IC REG CTRLR PWM VM 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6744AAUZ-T | 功能描述:IC REG CTRLR PWM VM 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6744AB | 功能描述:电压模式 PWM 控制器 Intermediate Bus RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
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