- 您现在的位置：买卖IC网 > PDF目录17314 > ISL8200MEVAL1PHZ (Intersil)EVAL BAORD FOR ISL8200 PDF资料下载
参数资料
| 型号： | ISL8200MEVAL1PHZ |
| 厂商： | Intersil |
| 文件页数： | 15/23页 |
| 文件大小： | 0K |
| 描述： | EVAL BAORD FOR ISL8200 |
| 产品培训模块： | Solutions for Industrial Control Applications |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 0.6 ~ 6 V |
| 电流 - 输出： | 10A |
| 输入电压： | 3 ~ 20 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 700kHz ~ 1.5MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL8200 |
ISL8200M
when recovering from faults. A 1nF capacitor is
recommended as a starting value for typical application.
The voltage on the FF pin needs to be above 0.7V prior to
soft-start and during PWM switching to ensure reliable
regulation. In a typical application, FF pin can be shorted
to EN pin.
Fault Handshake
allowable pre-charged level is 113%. If the pre-charged
level is above 113% but below 120%, the output will
hiccup between 113% (LGATE turns on) and 87%
(LGATE turns off) while EN is pulled low. If the pre-
charged load voltage is above 120% of the targeted
output voltage, then the controller will be latched off and
not be able to power-up.
t SS = -------------
In a multi-module system, with the EN pins wired OR’ed
together, all modules can immediately turn off, at one
time, when a fault condition occurs in one or more
modules. A fault would pull the EN pin low, disabling all
the modules and would not creating current bounce.
Thus, no single channel would be over stressed when a
fault occurs.
FIRST PWM PULSE
0.0V
-100mV
SS Settling at VREF + 100mV
VOUT TARGET VOLTAGE
2560
f SW
t SS_DLY ≈ ------------
Since the EN pins are pulled down under fault conditions,
the pull-up resistor (RUP) should be scaled to sink no
more than 5mA current from EN pin. Essentially, the EN
pins cannot be directly connected to VCC.
384
F SW
FIGURE 22. SOFT-START WITH VOUT = 0V
Soft-Start
The ISL8200M has an internal digital pre-charged
soft-start circuitry, which has a rise time inversely
proportional to the switching frequency and is
determined by an digital counter that increments with
FIRST PWM PULSE
INIT. VOUT
SS Settling at VREF + 100mV
VOUT TARGET VOLTAGE
every pulse of the phase clock. The full soft-start time
from 0V to 0.6V can be estimated by Equation 5.
-100mV
FIGURE 23. SOFT-START WITH VOUT < TARGET
t SS = -------------
2560
f SW
(EQ. 5)
VOLTAGE
The ISL8200M has the ability to work under a pre-
charged output. The PWM outputs will not feed to the
drivers until the first PWM pulse is seen. The low side
MOSFET is being held low for first clock cycle to provide
charge for the bootstrap capacitor. If the pre-charged
output voltage is greater than the final target level but
less than the 113% setpoint, switching will not start until
the output voltage is reduced to the target voltage and
the first PWM pulse is generated. The maximum
OV = 113%
FIRST PWM PULSE
VOUT TARGET VOLTAGE
FIGURE 24. SOFT-START WITH VOUT BELOW OV BUT
ABOVE FINAL TARGET VOLTAGE
I EN_HYS
R ? V
EN_REF
V EN_FTH – V EN_REF
V EN_HYS
R UP = -----------------------------
UP
R DOWN = ---------------------------------------------------------------
V EN_FTH = V EN_RTH – V EN_HYS
V CC_FF
G RAMP = 1.25
∑
VCC - 1.4V
UPPER LIMIT
Δ V
RAMP
= LIMIT(V
CC_FF
× G
RAMP
, VCC - 1.4V - V
RAMP_OFFSET
)
0.8V
LIMITER
SAWTOOTH
AMPLITUDE
( Δ V RAMP )
VIN
FF
V RAMP_OFFSET = 1.0V
LOWER LIMIT
(RAMP OFFSET)
0.8V
SYSTEM DELAY
R UP
R DOWN
EN
I EN_HYS = 30μA
384 Clock
Cycles
SOFT-START
OV, OT, OC, AND PLL LOCKING FAULTS
FIGURE 25. SIMPLIFIED ENABLE AND VOLTAGE FEEDFORWARD CIRCUIT
15
FN6727.1
February 26, 2010
相关PDF资料 |
PDF描述 |
|---|---|
| ECM10DSXH | CONN EDGECARD 20POS DIP .156 SLD |
| ISL8105AEVAL1Z | EVALUATION BOARD FOR ISL8105A |
| EBM12DSES | CONN EDGECARD 24POS .156 EYELET |
| EBM10DSEI | CONN EDGECARD 20POS .156 EYELET |
| EEM15DRYS | CONN EDGECARD 30POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL8200MEVAL2PHZ | 功能描述:电源管理IC开发工具 ISL8200M EVAL BBRD 2 PHS 23LD ROH RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| ISL8200MIRZ | 功能描述:DC/DC转换器 STAND ALONE 10A DC/D CSTEPDWNPWRSUPPYMOD1 RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| ISL8200MIRZ-T | 功能描述:DC/DC转换器 ST& ALONE 10A DC/DC DWN PWR SUPPLY MOD RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| ISL8200MIRZ-TR5545 | 制造商:Intersil Corporation 功能描述:STAND ALONE 10A DC/DC STEP DOWN POWER SUPPLY MODULE, 15 X 15 - Tape and Reel |
| ISL8200MMREP | 制造商:Intersil Corporation 功能描述:V62/10608-01XB, STAND ALONE 10A DC/DC STEP DOWN POWER SUPPLY - Trays |
发布紧急采购，3分钟左右您将得到回复。