参数资料
| 型号： | ISL6611AIRZ |
| 厂商： | Intersil |
| 文件页数： | 13/14页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR DOUBLER PWM 16-QFN |
| 标准包装： | 75 |
| PWM 型： | 控制器 |
| 输出数： | 2 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 4.5 V ~ 5.5 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 是 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-VQFN 裸露焊盘 |
| 包装： | 管件 |
ISL6611A
part, connect it to the adjacent net (LGATE2/PHASE2) can
reduce trace inductance.
? Shorten all gate drive loops (UGATE-PHASE and
LGATE-PGND) and route them closely spaced.
? Minimize the inductance of the PHASE node. Ideally, the
source of the upper and the drain of the lower MOSFET
should be as close as thermally allowable.
? Minimize the current loop of the output and input power
trains. Short the source connection of the lower MOSFET
to ground as close to the transistor pin as feasible. Input
capacitors (especially ceramic decoupling) should be
placed as close to the drain of upper and source of lower
MOSFETs as possible.
? Avoid routing relatively high impedance nodes (such as
PWM and ENABLE lines) close to high dV/dt UGATE and
C DS /C GS ratio, and a lower gate-source threshold upper
FET will require a smaller resistor to diminish the effect of
the internal capacitive coupling. For most applications, the
integrated 20k Ω typically sufficient, not affecting normal
performance and efficiency.
The coupling effect can be roughly estimated with the
equations in Equation 7, which assume a fixed linear input
ramp and neglect the clamping effect of the body diode of
the upper drive and the bootstrap capacitor. Other parasitic
components such as lead inductances and PCB
capacitances are also not taken into account. These
equations are provided for guidance purposes only. Thus,
the actual coupling effect should be examined using a very
high impedance (10M Ω or greater) probe to ensure a safe
design margin.
DS
?
---------------------------------- ?
? dV ?
V GS_MILLER = ------- ? R ? C rss ? 1 – e dt
iss ?
------- ? R ? C
PHASE nodes.
In addition, connecting the thermal pad of the QFN package
to the power ground through multiple vias, or placing a low
noise copper plane (such as power ground) underneath the
dV
– V
dt ? ?
? ?
? ?
(EQ. 7)
SOIC part is recommended. This is to improve heat
dissipation and allow the part to achieve its full thermal
R = R UGPH + R GI
C rss = C GD
C iss = C GD + C GS
potential.
Upper MOSFET Self Turn-On Effects At Start-up
Should the driver have insufficient bias voltage applied, its
outputs are floating. If the input bus is energized at a high
VCC
BOOT
C BOOT
VIN
D
dV/dt rate while the driver outputs are floating, due to the
C GD
self-coupling via the internal C GD of the MOSFET, the
UGATE could momentarily rise up to a level greater than the
threshold voltage of the MOSFET. This could potentially turn
DU
DL
UGATE
G
R GI
C DS
on the upper switch and result in damaging in-rush energy.
Therefore, if such a situation (when input bus powered up
before the bias of the controller and driver is ready) could
conceivably be encountered, it is common practice to place
PHASE
C GS
S
Q UPPER
a resistor (R UGPH ) across the gate and source of the upper
MOSFET to suppress the Miller coupling effect. The value of
FIGURE 9. GATE TO SOURCE RESISTOR TO REDUCE
UPPER MOSFET MILLER COUPLING
the resistor depends mainly on the input voltage’s rate of
rise, the C GD /C GS ratio, as well as the gate-source
threshold of the upper MOSFET. A higher dV/dt, a lower
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
13
FN6881.1
August 28, 2012
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6617IRZ | IC PWM DOUBLER MONITOR 10DFN |
| ISL6627IRZ-T | IC CONTROLLER VR11.1 VR12 10DFN |
| ISL6719ARZ-T | IC REG LDO ADJ .1A 9-DFN |
| ISL6720AARZ | IC REG LDO 5V/ADJ 11-DFN |
| ISL6721AAVZ | IC REG CTRLR PWM CM 16-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6611AIRZ-T | 功能描述:IC REG CTRLR DOUBLER 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:- 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) |
| ISL6612ACB | 功能描述:IC MOSFET DRVR SYNC BUCK 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:50 系列:- 配置:低端 输入类型:非反相 延迟时间:40ns 电流 - 峰:9A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:4.5 V ~ 35 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263 包装:管件 |
| ISL6612ACB-T | 功能描述:IC MOSFET DRVR SYNC BUCK 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:50 系列:- 配置:低端 输入类型:非反相 延迟时间:40ns 电流 - 峰:9A 配置数:1 输出数:1 高端电压 - 最大（自引导启动）:- 电源电压:4.5 V ~ 35 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-263-6，D²Pak（5 引线+接片），TO-263BA 供应商设备封装:TO-263 包装:管件 |
| ISL6612ACBZ | 功能描述:IC DRIVER MOSFET SYNC BUCK 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:95 系列:- 配置:高端和低端，独立 输入类型:非反相 延迟时间:160ns 电流 - 峰:290mA 配置数:1 输出数:2 高端电压 - 最大（自引导启动）:600V 电源电压:10 V ~ 20 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SOIC 包装:管件 产品目录页面:1381 (CN2011-ZH PDF) |
| ISL6612ACBZA | 功能描述:IC MOSFET DRVR SYNC BUCK 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - MOSFET，电桥驱动器 - 外部开关 系列:- 标准包装:6,000 系列:* |
发布紧急采购，3分钟左右您将得到回复。