參數(shù)資料
型號(hào)： SC2422ACSTR
廠商： Semtech Corporation
英文描述： BIPHASE CURRENT MODE CONTROLLER
中文描述： 雙相電流模式控制器
文件頁(yè)數(shù)： 1/10頁(yè)
文件大?。?/td> 114K
代理商： SC2422ACSTR
SC2422A
BIPHASE CURRENT MODE
CONTROLLER
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PRELIMINARY - August 7, 2000
1
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DEVICE
(1)
PACKAGE
TEMP. RANGE (T
J
)
0 - 125°C
SC2422ACS.TR
SO-16
SC2422A.EVB
Evaluation Board
ORDERING INFORMATION
Note:
(1) Only available in tape and reel packaging. A reel con-
tains 1000 devices.
FEATURES
Precision, pulse by pulse phase current match-
ing
Active drooping allows for best transient response
Input Sensing Current mode control
Programmable DAC step size/offset allows
Compliance with VRM9.0, VRM8.3 or VRM8.4
Externally programmable soft-start
5V or 12V input for next generation processors
0% minimum duty cycle improves transient re-
sponse
Externally Programmable UVLO with hysteresis
Cycle by cycle current limiting
Programmable Internal Oscillator to 1 MHz
VID IIIII Inhibit (No CPU)
APPLICATIONS
Intel Advanced Microprocessors
AMD Athlon
power supplies
Servers/Workstations, high density power supplies
TYPICAL APPLICATION SCHEMATIC
DESCRIPTION
The SC2422A biphase, current mode controller is de-
signed to work with Semtech smart synchronous
drivers, such as the SC1205, SC1305 or the SC1405 to
provide the DC/DC converter solution for the most
demanding Micro-processor applications. Input current
rather than output current sensing is used to guarantee
precision phase to phase current matching using a
single sense resistor on the input power line. Accurate
current sharing and pulse by pulse current limit are
implemented without the power loss and transient re-
sponse degradation associated with output current
sense methods. Two phase operation allows significant
reduction in input/output ripple while enhancing tran-
sient response.
The DAC step size and range are programmable with
external components thus allowing compliance with
new and emerging VID ranges.
A novel approach implements active droop, minimizing
output capacitor requirements during load transients.
This avoids the pitfalls of the passive droop implemen-
tation. This feature also allows easy implementation of
N+1 redundancy and current sharing among modules.
Programmable Under Voltage Lockout assures proper
start-up and shutdown by synchronizing the controller
to the driver supply. Wide PWM frequency range allows
use of low profile, surface mount components.
VIN
INPUT
Vout
VIN
Rf
Rref
Ri
SC1305
4
8
7
6
1
3
5
2
VDD
B
DRVH
PHASE
IN
VCC
DRVL
P
SC1305
4
8
7
6
1
3
5
2
VDD
B
DRVH
PHASE
IN
VCC
DRVL
P
Rsens
SC2422A
12
9
2
3
1
13
7
5
6
11
14
4
10
15
16
8
OUT2
GND
VID3
VID2
VID4
OUT1
FB
VID0
ERROUT
OC-
OC+
VID1
UVLO
BGOUT
VCC
RREF
T
V
相關(guān)PDF資料
PDF描述
SC2422A BIPHASE CURRENT MODE CONTROLLER
SC2422AEVB BIPHASE CURRENT MODE CONTROLLER
SC2434 TriPhase Current Mode Controller with Power Good
SC2434EVB TriPhase Current Mode Controller with Power Good
SC2434SWTR TriPhase Current Mode Controller with Power Good
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC2422AEVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:BIPHASE CURRENT MODE CONTROLLER
SC2424CSWTR 制造商:Semtech Corporation 功能描述:4 Phase Current Mode Controller
SC2424CSWTRT 制造商:Semtech Corporation 功能描述:MULTIPHASE CURRNT MODE CONTRLR
SC24-2R2-R 功能描述:INDUCTOR SHIELD 2.2UH 800MA SMD RoHS:是 類別:電感器，線圈，扼流圈 >> 固定式 系列:SC24 標(biāo)準(zhǔn)包裝:500 系列:1331 電感:1.2µH 電流:247mA 電流 - 飽和:247mA 電流 - 溫升:- 類型:鐵芯體 容差:±10% 屏蔽:屏蔽 DC 電阻(DCR):最大 730 毫歐 Q因子@頻率:40 @ 7.9MHz 頻率 - 自諧振:130MHz 材料 - 芯體:鐵 封裝/外殼:0.312" L x 0.115" W x 0.135" H（7.94mm x 2.92mm x 3.43mm） 安裝類型:表面貼裝 包裝:帶卷 (TR) 工作溫度:-55°C ~ 105°C 頻率 - 測(cè)試:7.9MHz
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