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參數資料
| 型號： | ISL6550AIR-T |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數： | 12/14頁 |
| 文件大小： | 415K |
| 代理商： | ISL6550AIR-T |
12
minimize the voltage drop across the bootstrap capacitor
during the on-time of the upper MOSFET. Initial calculations
with V
BOOT2
no less than 4V will quickly help narrow the
bootstrap capacitor range.
For example, consider an upper MOSFET is chosen with a
maximum gate charge, Q
g
, of 100nC. Limiting the voltage
drop across the bootstrap capacitor to 1V results in a value
of no less than 0.1
μ
F. The tolerance of the ceramic capacitor
should also be considered when selecting the final bootstrap
capacitance value.
A fast recovery diode is recommended when selecting a
bootstrap diode to reduce the impact of reverse recovery
charge loss. Otherwise, the recovery charge, Q
RR
, would
have to be added to the gate charge of the MOSFET and
taken into consideration when calculating the minimum
bootstrap capacitance.
ISL6527 DC-DC Converter Application
Circuit
Figure 8 shows an application circuit of a DC-DC Converter.
Detailed information on the circuit, including a complete
Bill-of-Materials and circuit board description, can be found
in Application Note AN9994.
Component Selection Notes:
C3,8,9 - Each 150mF, Panasonic EEF-UE0J151R or Equivalent.
D1 - 30mA Schottky Diode, MA732 or Equivalent
L1 - 1
μ
H Inductor, Panasonic P/N ETQ-P6F1ROSFA or Equivalent.
Q1- Fairchild MOSFET; ITF86110DK8.
2.5V @ 5A
FB
COMP
UGATE
PHASE
BOOT
GND
LGATE
ISL6527
R3
R5
C10
C11
R2
L1
D1
C7
C1
0.1
μ
F
C6
1
μ
F
C8,9
OCSET/SD
CPVOUT
C3
R1
9.76k
Q1
CT1
CT2
CPGND
VCC
3.3V
C2
C12
R4
GND
U1
GND
14
1
2
3
4
5
8
6
7
9
10
11
12
13
TP1
TP3
0.8V External Reference
6.49k
2.26k
124
1000pF
0.1
μ
F
33pF
5600pF
8200pF
C4
0.22
μ
F
C5
10
μ
F
Ceramic
REF_IN
FIGURE 8. 3.3V to 2.5V 5A DC-DC CONVERTER
ISL6527
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6550CIR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL6551AB | 制造商:Rochester Electronics LLC 功能描述:FULL BRIDGE CONTROLLER - Bulk |
| ISL6551AB-T | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ISL6551ABZ | 功能描述:IC REG CTRLR FLYBACK PWM 28-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| ISL6551ABZ-T | 功能描述:IC REG CTRLR FLYBACK PWM 28-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數:1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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