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参数资料
| 型号： | ISL8106IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 13/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 16-QFN |
| 标准包装： | 6,000 |
| 系列： | Robust Ripple Regulator™ (R³) |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 电源电压： | 7 V ~ 25 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 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： | 带卷 (TR) |
ISL8106
For the top-side MOSFET, its switching loss can be written
as:
2 2
V IN ? I VAL ? T ON ? F OSC V IN ? I PEAK ? T OFF ? F OSC
P SWTS ( V IN ) = ------------------------------------------------------------- + ---------------------------------------------------------------------
(EQ. 17)
The peak and valley current of the inductor can be obtained
based on the inductor peak-to-peak current and the load
Figure 7 highlights the voltage-mode control loop for a
synchronous-rectified buck converter. The output voltage is
regulated to the reference voltage level. The error amplifier
output is compared with the oscillator triangle wave to
provide a pulse-width modulated wave with an amplitude of
V IN at the LX node. The PWM wave is smoothed by the
output filter. The output filter capacitor bank’s equivalent
series resistance is represented by the series resistor ESR.
current. The turn-on and turn-off time can be estimated with
the given gate driver parameters in the Electrical
Specification Table.
C COMP1
Selecting The Bootstrap Capacitor
Δ V BOOT
C BOOT = ------------------------
The selection of the bootstrap capacitor can be written as:
Q g
(EQ. 18)
Where:
- Q g is the total gate charge required to switch the top-
side MOSFET
R COMP
COMP
EA
-
+
FB
C COMP2
R TOP
R BOTTOM
- Δ V BOOT , is the maximum allowed voltage decay across
the boot capacitor each time the MOSFET is switched on
As an example, suppose the top-side MOSFET has a total
gate charge Q G , of 25nC at V GS = 5V, and a Δ V BOOT of
200mV. The calculated bootstrap capacitance is 0.125μF;
select at least the first standard component value of greater
capacitance than calculated, that being 0.15μF. Use an X7R
REF
VO
R 3 Modulator FSET
or X5R ceramic capacitor.
Compensating the Converter
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 ISL8106 makes the LC output filter
resemble a first order system in which the closed loop stability
VIN
R FSET
VIN
C FSET
can be achieved with a Type II compensation network.
C COMP1
Q TOP_SIDE
TGATE
C COMP2
R COMP
LX
Gate Drivers
L OUT
DCR
R TOP
FB
?
ISL8106
Q BOTTOM_SIDE C OUT
V REF
ERROR
AMPLIFIER
COMP
GND
BGATE
ESR
FIGURE 6. SYSTEM CONTROL BLOCK DIAGRAM
FIGURE 7. COMPENSATION REFERENCE CIRCUIT
13
FN9283.1
November 10, 2006
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| ISL8107 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Single-Phase Pulse-Width Modulation (PWM) Controller with Integrated High-Side Gate Drivers |
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| ISL8107EVAL2Z | 功能描述:EVAL BOARD 2 FOR ISL8107 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8107IRZ | 功能描述:IC REG CTRLR BUCK PWM VM 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) |
| ISL8107IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 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) |
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