- 您现在的位置：买卖IC网 > PDF目录17310 > ISL6268EVAL1Z (Intersil)EVALUATION BOARD FOR ISL6268 PDF资料下载
参数资料
| 型号： | ISL6268EVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR ISL6268 |
| 标准包装： | 1 |
| 系列： | Robust Ripple Regulator™ (R³) |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 1.2V |
| 电流 - 输出： | 5A |
| 输入电压： | 7 ~ 25 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 300kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL6268 |
ISL6268
Programming the PWM Switching Frequency
The ISL6268 does not use a clock signal to produce PWM.
The PWM switching frequency F SW is programmed by the
resistor R FSET that is connected from the FSET pin to the
R2
C2
C1
GND pin. The approximate PWM switching frequency is
written as:
F SW = ---------------------------
R FSET = --------------------
1
K ? R FSET
Estimating the value of R FSET is written as:
1
K ? F SW
(EQ. 7)
(EQ. 8)
COMP
EA
-
+
FB
R1
where:
- F SW is the PWM switching frequency
- R FSET is the F SW programming resistor
- K = 75 x 10 -12
REF
FSET
It is recommended that whenever the control loop
compensation network is modified, F SW should be checked
for the correct frequency and if necessary, adjust R FSET .
R 3
MODULATOR
R FSET
C FSET
Compensation Design
The LC output filter has a double pole at its resonant frequency
that causes the phase to abruptly roll downward. The R 3
modulator used in the ISL6268 makes the LC output filter
VO
V OUT
resemble a first order system in which the closed loop stability
can be achieved with a Type II compensation network.
Your local Intersil representative can provide a PC-based
VIN
VIN
tool that can be used to calculate compensation network
component values and help simulate the loop frequency
response. The compensation network consists of the internal
error amplifier of the ISL6268 and the external components R1,
UG
PHASE
Q HIGH_SIDE
R2, C1, and C2, as well as the frequency setting components
R FSET and C FSET (all identified in Figure 5).
GATE DRIVERS
LG
GND
L OUT
Q LOW_SIDE
DCR
C OUT
C ESR
ISL6268
FIGURE 5. COMPENSATION REFERENCE CIRCUIT
10
FN6348.0
August 22, 2006
相关PDF资料 |
PDF描述 |
|---|---|
| A9CCA-2203E | FLEX CABLE - AFK22A/AE22/AFK22A |
| ISL6844EVAL1Z | EVALUATION BOARD 1 ISL6844 |
| A9CCA-2202E | FLEX CABLE - AFK22A/AE22/AFK22A |
| ISL8014EVAL2Z | EVALUATION BOARD FOR ISL8014 |
| A9CCA-1806F | FLEX CABLE - AFG18A/AF18/AFG18A |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6269 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Performance Notebook PWM Controller with Audio-Frequency Clamp |
| ISL6269_06 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Performance Notebook PWM Controller with Bias Regulator and Audio-Frequency Clamp |
| ISL6269A | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:High-Performance Notebook PWM Controller |
| ISL6269ACRZ | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:Robust Ripple Regulator™ (R³) 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) |
| ISL6269ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM 16-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:Robust Ripple Regulator™ (R³) 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) |
发布紧急采购，3分钟左右您将得到回复。