参数资料
| 型号： | ISL78215AUZ |
| 厂商： | Intersil |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST FLYBK ISO 8MSOP |
| 标准包装： | 980 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 占空比： | 48% |
| 电源电压： | 7.5 V ~ 18 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 管件 |
ISL78215
Gate Drive
The ISL78215 is capable of sourcing and sinking 1A peak
current. To limit the peak current through the IC, an optional
external resistor may be placed between the totem-pole output of
the IC (OUT pin) and the gate of the MOSFET. This small series
resistor also damps any oscillations caused by the resonant tank
of the parasitic inductances in the traces of the board and the
FET’s input capacitance.
Slope Compensation
For applications where the maximum duty cycle is less than 50%,
slope compensation may be used to improve noise immunity,
particularly at lighter loads. The amount of slope compensation
required for noise immunity is determined empirically, but is
generally about 10% of the full scale current feedback signal. For
applications where the duty cycle is greater than 50%, slope
compensation is required to prevent instability. The minimum
amount of slope compensation required corresponds to 1/2 the
inductor downslope. Adding excessive slope compensation,
however, results in a control loop that behaves more as a voltage
mode controller than as a current mode controller.
Slope compensation may be added to the CS signal shown in
Figure 7.
RTCT
VREF
CS
FIGURE 7. SLOPE COMPENSATION
Fault Conditions
A Fault condition occurs if VREF falls below 4.65V. When a Fault
is detected, OUT is disabled. When VREF exceeds 4.80V, the Fault
condition clears, and OUT is enabled.
CURRENT SENSE SIGNAL
DOWNSLOPE
Ground Plane Requirements
Careful layout is essential for satisfactory operation of the device.
A good ground plane must be employed. A unique section of the
ground plane must be designated for high di/dt currents
associated with the output stage. V DD should be bypassed
directly to GND with good high frequency capacitors.
TIME
FIGURE 6. CURRENT SENSE DOWNSLOPE
9
FN7673.1
December 7, 2013
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| ISL78215AUZ-T | 功能描述:IC REG CTRLR BST FLYBK ISO 8MSOP 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) |
| ISL78220 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:6-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement |
| ISL78220ANEZ | 功能描述:电流型 PWM 控制器 ISL78220ANEZ Automotive Grade 6-Phase Boost PWM Controller - 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 |
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| ISL78220ANZ-T | 制造商:Intersil Corporation 功能描述:AUTOMOTIVE GRADE 6-PHASE BOOST PWM CONTROLLER - 44LD TQFP PB - Tape and Reel |
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