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參數(shù)資料
| 型號(hào)： | ISL6439ACB |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Sync Buck PWM Controller for Broadband Gateway Applications |
| 中文描述： | SWITCHING CONTROLLER, 625 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, MS-012AB, SOIC-14 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大?。?/td> | 379K |
| 代理商： | ISL6439ACB |
13
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.
ISL6439 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
the ISL6439 Application Note.
Component Selection Notes:
C
3,8,9
- Each
150
μ
F, Panasonic EEF-UE0J151R or Equivalent.
D1 - 30mA Schottky Diode, MA732 or Equivalent
L
1
- 1
μ
H Inductor, Panasonic P/N ETQ-P6F1ROSFA or Equivalent.
Q
1
-
Fairchild MOSFET; ITF86110DK8.
2.5V @ 5A
FB
COMP
UGATE
PHASE
BOOT
GND
LGATE
ISL6439
R
3
R
5
1.07k
C
10
C
11
R
2
L
1
D
1
C
7
C
1
0.1
μ
F
C
4
C
6
1
μ
F
C
8,9
OCSET
CPVOUT
C
3
R
1
Q
1
CT1
CT2
CPGND
VCC
3.3V
C
5
10
μ
F
Ceramic
C
2
C
12
R
4
GND
U
1
GND
14
1
2
3
4
5
8
6
7
9
10
11
12
13
TP
1
TP
3
ENABLE
9.76k
6.49k
2.26k
124
1000pF
0.22
μ
F
0.1
μ
F
33pF
5600pF
8200pF
ENABLE
FIGURE 8. 3.3V to 2.5V 5A DC-DC CONVERTER
ISL6439
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PDF描述 |
|---|---|
| ISL6439ACR | Single Sync Buck PWM Controller for Broadband Gateway Applications |
| ISL6439AIR | Single Sync Buck PWM Controller for Broadband Gateway Applications |
| ISL6439AIRZ | Single Sync Buck PWM Controller for Broadband Gateway Applications |
| ISL6439CB | 10-Bit Bus Termination Networks With Bus Hold Function 14-SOIC -40 to 85 |
| ISL6439CBZ | Single Sync Buck PWM Controller for Broadband Gateway Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL6439ACB-T | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: |
| ISL6439ACR | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: |
| ISL6439ACR-T | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: |
| ISL6439AIB | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
| ISL6439AIB-T | 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
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