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参数资料
| 型号： | ISL6840IB |
| 厂商： | INTERSIL CORP |
| 元件分类： | 稳压器 |
| 英文描述： | Improved Industry Standard Single-Ended Current Mode PWM Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | PLASTIC, MS-012AA, SOIC-8 |
| 文件页数： | 7/11页 |
| 文件大小： | 307K |
| 代理商： | ISL6840IB |
7
FN9124.6
June 28, 2005
Pin Descriptions
RTCT -
This is the oscillator timing control pin. The
operational frequency and maximum duty cycle are set by
connecting a resistor, RT, between VREF and this pin and a
timing capacitor, CT, from this pin to GND. The oscillator
produces a sawtooth waveform with a programmable
frequency range up to 2.0MHz. The charge time, T
C
, the
discharge time, T
D
, the switching frequency, f, and the
maximum duty cycle, Dmax, can be calculated from the
following equations:
Figure 4 may be used as a guideline in selecting the
capacitor and resistor values required for a given frequency.
COMP -
COMP is the output of the error amplifier and the
input of the PWM comparator. The control loop frequency
compensation network is connected between the COMP and
FB pins.
FB -
The output voltage feedback is connected to the
inverting input of the error amplifier through this pin. The
non-inverting input of the error amplifier is internally tied to a
reference voltage.
CS -
This is the current sense input to the PWM comparator.
The range of the input signal is nominally 0 to 1.0V and has
an internal offset of 100mV.
GND -
GND is the power and small signal reference ground
for all functions.
OUT -
This is the drive output to the power switching device.
It is a high current output capable of driving the gate of a
power MOSFET with peak currents of
1.0A
. This GATE
output is actively held low when V
DD
is below the UVLO
threshold.
Typical Performance Curves
FIGURE 1. FREQUENCY vs TEMPERATURE
FIGURE 2. REFERENCE VOLTAGE vs TEMPERATURE
FIGURE 3. EA REFERENCE vs TEMPERATURE
FIGURE 4. RTCT vs FREQUENCY
1.02
1.01
1
0.99
0.98
0.97-40
-10
20
50
80
110
TEMPERATURE (°C)
N
TEMPERATURE (
°
C)
N
R
1.001
1
0.999
0.998
0.997
0.996
0.995
-40
-25
-10
5
20
35
50
65
80
95 110
TEMPERATURE (°C)
N
1.002
1
0.998
0.996
0.994
-40 -25
-10
5
20
35
50
65
80
95
110
1-10
3
100
10
1
10
20
30
40
50
RT (k
)
60
70
80
90
100
F
CT=
100pF
220pF
330pF
470pF
1.0nF
2.2nF
3.3nF
4.7nF
TC
0.583
RT
CT
≈
(EQ. 1)
TD
RT
–
CT
0.0083
RT
2.4
–
----------------------------------–
ln
≈
(EQ. 2)
f
1
TC
TD
+
(
)
=
(EQ. 3)
D
TC
f
=
(EQ. 4)
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844, ISL6845
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6840IU | Improved Industry Standard Single-Ended Current Mode PWM Controller |
| ISL6841IU | Octal Buffers/Drivers With 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6842IU | Octal Buffers/Drivers With 3-State Outputs 20-TSSOP -40 to 85 |
| ISL6843IU | Octal Buffers/Drivers With 3-State Outputs 20-SSOP -40 to 85 |
| ISL6844IU | Octal Buffers/Drivers With 3-State Outputs 20-SOIC -40 to 85 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6840IB-T | 功能描述:IC REG CTRLR BST FLYBK ISO 8SOIC 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) |
| ISL6840IBZ | 功能描述:电流型 PWM 控制器 CUR MODE PWM 100% DU TY CYCLE 7.0V UVLO RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6840IBZ-T | 功能描述:IC REG CTRLR BST FLYBK ISO 8SOIC 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) |
| ISL6840IRZ-T | 功能描述:IC REG CTRLR BST FLYBK ISO 8-DFN 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) |
| ISL6840IU | 功能描述:IC REG CTRLR BST FLYBK ISO 8MSOP 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) |
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