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参数资料
| 型号： | ISL6740IBZ |
| 厂商： | INTERSIL CORP |
| 元件分类： | 稳压器 |
| 英文描述： | Flexible Double Ended Voltage and Current Mode PWM Controllers |
| 中文描述： | 0.5 A SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | ROHS COMPLIANT, PLASTIC, MS-012-AC, SOIC-16 |
| 文件页数： | 2/29页 |
| 文件大小： | 635K |
| 代理商： | ISL6740IBZ |
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10
FN9111.4
July 13, 2007
Pin Descriptions
VDD - VDD is the power connection for the IC. To optimize
noise immunity, bypass VDD to GND with a ceramic
capacitor as close to the VDD and GND pins as possible.
The total supply current, IDD, will be dependent on the load
applied to outputs OUTA and OUTB. Total IDD current is the
sum of the quiescent current and the average output current.
Knowing the operating frequency, fSW, and the output
loading capacitance charge, Q, per output, the average
output current can be calculated from:
SYNC - A bidirectional synchronization signal used to
coordinate the switching frequency of multiple units.
Synchronization may be achieved by connecting the SYNC
signal of each unit together or by using an external master
clock signal. The oscillator timing capacitor, CT, is always
required regardless of the synchronization method used.
The paralleled unit with the highest oscillator frequency
assumes control.
RTC - This is the oscillator timing capacitor charge current
control pin. A resistor is connected between this pin and
GND. The current flowing through the resistor determines
the magnitude of the charge current. The charge current is
nominally twice this current. The PWM maximum ON time is
determined by the timing capacitor charge duration.
RTD - This is the oscillator timing capacitor discharge
current control pin. A resistor is connected between this pin
and GND. The current flowing through the resistor
determines the magnitude of the discharge current. The
discharge current is nominally 50x this current. The PWM
deadtime is determined by the timing capacitor discharge
duration.
CT - The oscillator timing capacitor is connected between
this pin and GND.
VERROR - The inverting input of the PWM comparator. The
error voltage is applied to this pin to control the duty cycle.
Increasing the signal level increases the duty cycle. The
Typical Performance Curves
FIGURE 1. REFERENCE VOLTAGE vs TEMPERATURE
FIGURE 2. OSCILLATOR CT DISCHARGE CURRENT GAIN
FIGURE 3. DEADTIME (TD) vs CAPACITANCE
FIGURE 4. CAPACITANCE vs FREQUENCY
1.001
1.000
0.999
0.998
0.997
-40
-25
-10
5
20
35
50
65
80
95
110
TEMPERATURE (°C)
NORMALIZ
E
D
V
REF
65
60
55
50
45
40
0
50
100 150 200 250 300 350 400 450 500
RTD CURRENT (A)
C
T
DIS
C
H
ARGE
C
URRENT
GAIN
1104
1103
100
10
20
30
40
50
60
70
80
90
100
RTD (k
Ω)
DEADTIME
-
TD
(ns
)
470
330
220
100
CT (pF) =
680
1000
1106
1104
60
70
80
90
100
RTC (k
Ω)
FR
E
Q
UENCY
(Hz)
10
20
30
40
50
680
1000
330
470
220
100
CT (pF) =
RTD = 10k
1105
I
OUT
2Qf
SW
=
A
(EQ. 1)
ISL6740, 1SL6741
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| ISL6740IBZ-T | 功能描述:IC REG CTRLR PWM VM 16-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) |
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| ISL6740IV-T | 功能描述:IC REG CTRLR PWM VM 16-TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| ISL6740IVZ | 功能描述:电压模式 PWM 控制器 VOLT PWM MODE CONTRL 16LD TSSOP 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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