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參數(shù)資料
| 型號： | SC2677B |
| 廠商： | Semtech Corporation |
| 英文描述： | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| 中文描述： | 雙同步電壓模式控制器的電流共享電路 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 557K |
| 代理商： | SC2677B |
1
www.semtech.com
SC2677B
Dual Synchronous Voltage Mode
Controller with Current Sharing Circuitry
POWER MANAGEMENT
Description
Features
300kHz to 1MHz externally programmable
frequency operation
Soft Start and Enable function
Power Good output provided
Cycle-by-cycle peak current limit
Latch Off for over current protection
Phase-shifted switchers minimize ripple
High-efficiency operation, >90%
Programmable output(s) as low as 0.5V
Industrial temperature range
TSSOP-24 package
TSSOP-24 EDP package
Bias voltage as low as 4.5V
Adjustable phase shift between channels
The SC2677B is a versatile 2 phase, synchronous, voltage
mode PWM controller that can be used in two distinct ways.
First, the SC2677B is ideal for applications where point of
use output power exceeds any single input power budget.
Alternatively, the SC2677B can be configured as a dual
switcher. The SC2677B features a precise temperature
compensated voltage reference, cycle-by-cycle peak cur-
rent limit, under voltage lockout over current protection,
and internal level-shifted high-side gate drive circuitry.
In current sharing configuration, the SC2677B can produce
a single output voltage from two separate input voltage
sources (which can be different in voltage levels) while
maintaining current sharing between the two channels.
Current sharing is programmable to allow each input sup-
ply to be loaded differently per application requirements.
In dual switcher configuration, two feedback paths are pro-
vided for independent control of the separate outputs. The
device will provide a regulated output from flexibly config-
ured inputs, such as 3.3V, 5V, 12V etc. The phasing be-
tween the two switchers is adjustable to minimize the input
and output ripple.
Two Phase, Current Sharing Controller
Flexible, same or separate V
Programmable current sharing
Thermal distribution via multi-phase output
Graphics cards
Peripheral add-in card
Dual-phase power supply
Power supplies requiring two outputs
CS1+
CS2+
C6
M5
C62
D1
CS1+
R20
C39
R49
R5
C63
M7
PWRGD
Vout2
R48
R21
D3
D2
C4
C25
M3
C38
CS2-
CS2-
R8
L1
1
2
D4
C36
C23
C19
CS1-
L2
1
2
U1
SC2677B
3
4
5
6
7
8
9
1
1
1
1
2
2
2
1
1
1
1
1
1
1
2
2
2
V
F
V
+
-
C
B
D
D
P
B
G
P
S
P
-
C
B
D
D
C
C
C
C
C26
R18
R19
C57
CS1-
R50
Vin
R10
C28
ENABLE
C33
Vout1
CS2+
R13
M1
R14
C43
C59
R51
Dual Independent outputs
Typical Application Schematic
Applications
Revision: Dec. 15, 2004
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| SC2677BEVB-1 | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BEVB-2 | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BITSTRT | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BTETRT | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677 | Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SC2677B_09 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BEVB-1 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BEVB-2 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BITSTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry |
| SC2677BTE.TRT | 制造商:SEMTECH 功能描述:I.C. |
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