參數(shù)資料
型號(hào): ISL6439IBZ
廠商: INTERSIL CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: Single Sync Buck PWM Controller for Broadband Gateway Applications
中文描述: SWITCHING CONTROLLER, 340 kHz SWITCHING FREQ-MAX, PDSO14
封裝: LEAD FREE, PLASTIC, MS-012-AB, SOIC-14
文件頁(yè)數(shù): 13/15頁(yè)
文件大?。?/td> 379K
代理商: ISL6439IBZ
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
相關(guān)PDF資料
PDF描述
ISL6439IBZ-T Single Sync Buck PWM Controller for Broadband Gateway Applications
ISL6439CBZ-T Single Sync Buck PWM Controller for Broadband Gateway Applications
ISL6440A Advanced PWM and Triple Linear Power Controller for Gateway Applications
ISL6440ACB Advanced PWM and Triple Linear Power Controller for Gateway Applications
ISL6440IAZ-T SMT RELAY
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISL6439IBZ-T 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 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)
ISL6439IBZ-TS2705 制造商:Intersil Corporation 功能描述:CISCO, ISL6439IBZ-T W/CONTAINER LABELING - Tape and Reel
ISL6439IR 功能描述:IC REG CTRLR BUCK PWM VM 16-QFN RoHS:否 類(lèi)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
ISL6439IR-T 功能描述:IC REG CTRLR BUCK PWM VM 16-QFN RoHS:否 類(lèi)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
ISL6439IRZ 功能描述:IC REG CTRLR BUCK PWM VM 16-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無(wú) 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 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)