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參數(shù)資料
| 型號(hào)： | ISL6232CAZA |
| 廠商： | INTERSIL CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency System Power Supply Controller for Notebook Computers |
| 中文描述： | 2 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, QSOP-28 |
| 文件頁數(shù)： | 13/25頁 |
| 文件大?。?/td> | 746K |
| 代理商： | ISL6232CAZA |
13
FN9116.0
April 18, 2005
Theory of Operation
The ISL6232 is a high-efficiency quad output controller
optimized for converting battery, wall adapter, or network DC
input voltage into system supply voltages required for
portable applications where high efficiency and low
quiescent supply current are required. The ISL6232
includes two PWM controllers that are fixed at 5V and 3.3V
respectively, or they can be programmed from 0.8V to 5.5V.
Figure 30 shows its functional block diagram. ISL6232 uses
a constant-frequency, 300kHz, peak current-mode PWM
control scheme with 180
o
out-of-phase operation for
reducing the input ripple current and also ESR requirement
of the input capacitors. Light-load efficiency is improved by
the variable-frequency pulse-skipping operation that reduces
switching losses and gate-charge losses. In order to
eliminate the audio noise at extremely light load condition,
the ultrasonic pulse skipping mode is selectable by tying
SKIP# pin to REF so that a minimum 25kHz switching
frequency can be maintained.
Each switching-mode step-down circuit includes two
external N-MOSFETs and an LC output filter. The output
voltage is the average AC voltage at PHASE node, which is
regulated by changing the duty cycle of the external N-
MOSFETs. The gate-drive signal to the high side MOSFET
must exceed VIN voltage and is provided by a 0.1μF boost
capacitor, which is connected between BOOT and PHASE.
LDO5
BOOT5
UGATE5
PHASE5
LGATE5
PGND
CS5
OUT5
FB5
COMP5
REF
PGOOD
EN5
LDO3
VIN
BOOT3
UGATE3
PHASE3
LGATE3
CS3
OUT3
GND
FB3
COMP3
SKIP#
EN3
SHDN#
VIN: 5.5V to 22V
5V/5A
3.3V/5A
IRF7807V
IRF7811AV
L1:6.8H
L1:6.8μH
Q3
IRF7807V
Q4
IRF7811AV
10μF
5V ALWAYS ON
C2
180μF
12m
6.3V
270pF
0.1μF
Rdc1:22m
Rdc1:12m
300k
390k
270pF
4.7μF
0.22μF
C9
0.1μF
10μF
C11
220μF
12m
4.0V
VCC
0.1μF
VCC
4.7μF
3.3V ALWAYS ON
1μF
Rdc218m
L2:4.7μH
Rdc2:12m
100k
R7:1.5k
R8: 3k
C8: 0.47μF
R9: 1.0k
R4: 2.0k
C15: 0.47μF
VCC
REF
ON
OFF
ISL6232
OUT5
OUT3
Q1
Q2
C1
C3
C4
R3
R5
C5
C6
C7
C10
C13
C12
C14
R6
FIGURE 29. ISL6232 TYPICAL APPLICATION CIRCUIT WITH DCR CURRENT SENSING
ISL6232
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|---|---|
| ISL6232CAZA-T | 功能描述:熱插拔功率分布 W/ANEAL HI EFF SYSTM PWR SUPPLY CONTR RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| ISL6232CAZ-T | 制造商:Intersil Corporation 功能描述:LEAD-FREE HI EFFICIENCY SYSTEM PWR SUPPLY CONTR FOR NOTEBOOK - Tape and Reel |
| ISL6232EVAL1 | 功能描述:EVALUATION BOARD 1 ISL6232 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6235 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications |
| ISL6235CA | 制造商:Rochester Electronics LLC 功能描述:SYSTEM ELECTRONICS REGULATOR FOR LCD-PC - Bulk |
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