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參數(shù)資料
| 型號： | SC2434EVB |
| 廠商： | Semtech Corporation |
| 英文描述： | TriPhase Current Mode Controller with Power Good |
| 中文描述： | 三相電流模式控制器與電源良好 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 302K |
| 代理商： | SC2434EVB |
1
www.semtech.com
POWER MANAGEMENT
Description
The SC2434, a tri-phase, current mode controller is
designed to work with Semtech smart synchronous
drivers, such as the SC1205, SC1206, and SC1207 to
provide the DC/DC converter solution for the most
demanding Microprocessor applications. Input current
sensing is used to guarantee precision phase to phase
current matching using a single sense resistor on the
input power line. This topology reduces the power loss
and complexity associated with output current sense
methods. Multi phase operation allows significant
reduction in input/output ripple while enhancing
transient response. Two or three phase operation is
selectable. The DAC step size and range are program-
mable with external components thus allowing compliance
with new and emerging VID ranges. A novel approach
implements active droop to minimize output capacitors
during load transients.
Typical Application Circuit
SC2434
TriPhase Current Mode Controller
with Power Good
May 18, 2005
Features
!
12V input
!
Input sensing current mode control
!
Selectable 2 or 3 phase operation
!
Precision, pulse by pulse phase current matching
!
Active drooping allows for best transient response
!
Programmable internal oscillator to 1.5 MHz
!
Programmable DAC step size/offset allows compli-
ance with VRM9.0 and VRM9.2
!
VID 11111 Inhibit (No CPU)
!
Externally programmable soft-start
!
0% minimum duty cycle improves transient
response
!
Cycle by cycle current limiting plus hiccup
!
Power good signal
Applications
!
Intel Pentium-4 microprocessors
!
High performance desktop systems
+12V
C17
1uF
D1
1N4148
+5V
R2
2R2
R9
2R2
L4
600nH
+5V_ATX
C6
4.7uF
+
C21
1500uF/6.3V
D6
1N4148
+
2200C2
VID0
C24
1uF
R_OS
46.4K
+
C26
1500uF/6.3V
C23
2.2nF
+
C7
1500uF/6.3V
D3
1N4148
C16
M4
+
C10
U1
SC1205
1
2
3
4
5
6
7
8
DRN
TG
BST
CO
EN
VS
BG
PGND
C5
4.7uF
M5
R4
1R
+
C18
R29
100
VCCVID_PWRGD(Open Collector Input)
+
C32
+12V
VOUT
C35
1uF
C4
1uF
C9
1nF
M6
Differential
Pair
R_COMP
75K
C15
+12V
C22
L1
600nH
U2
SC2434
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
VID4
VID3
VID2
VID1
VID0
PGIN
ERROUT
PGOUT
FB
OSCREF
DACREF
OC+
OC-
AGND
PC
OUT3
OUT2
OUT1
BGOUT
VCC
D2
1N4148
R10
1R
R5
20
D5
C34
2.2nF
+
C28
R15
1K
R_OSC
C27
1uF
L2
600nH
VID4
M3
R17
1
SM/R_1206
Differential
Pair
M2
R14
2R2
R6
1
C76
0.33uF
C75
0.33uF
C11
2.2nF
U3
SC1205
1
2
3
4
5
6
7
8
DRN
TG
BST
CO
EN
VS
BG
PGND
C33
1nF
+
C30
1500uF/6.3V
+
C14
1500uF/6.3V
R1
3m
R16
1R
M1
+
2200C1
V_PULL_UP
+
C19
1500uF/6.3V
R_FB
10K
+
C20
C77
0.33uF
R_DRP
187K
D4
R3
2R2
C31
R8
+
2200C3
VID3
R13
+
C25
+5V
C12
1uF
AGND
C13
C_COMP
18pF
+12V_ATX
C29
100nF
VID1
C8
PWR_GOOD
R19
VID2
SC1205
1
2
3
4
5
6
7
8
DRN
TG
BST
CO
EN
VS
BG
PGND
PGND
R_DAC
L3
600nH
R11
1
SM/R_1206
R20
1K
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| SC2434SWTR | TriPhase Current Mode Controller with Power Good |
| SC2434SWTRT | TriPhase Current Mode Controller with Power Good |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC2434SW.TR | 制造商:Semtech Corporation 功能描述: |
| SC2434SWTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:TriPhase Current Mode Controller with Power Good |
| SC2434SWTRT | 制造商:Semtech Corporation 功能描述:Current Mode PWM Controller 3.3V 2.5mA 20-Pin SOIC T/R |
| SC2434TSTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:TriPhase Current Mode Controller with Power Good |
| SC2434TSTRT | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:TriPhase Current Mode Controller with Power Good |
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