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參數(shù)資料
| 型號： | SC2422AEVB |
| 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 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 114K |
| 代理商： | SC2422AEVB |
SC2422A
BIPHASE CURRENT MODE
CONTROLLER
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
PRELIMINARY - August 7, 2000
4
PIN CONFIGURATION
Top View
(16-Pin SOIC)
FUNCTIONAL BLOCK DIAGRAM
PIN DESCRIPTION
Pin 1
: VID4 , MSB
Pin 2
: VID3
Pin 3:
VID2
Pin 4:
VID 1
Pin 5:
VID0 , LSB
Pin 6:
ERROUT Error-amplifier output.
Pin 7:
FB Error-amplifier inverting input.
Pin 8:
RREF Frequency setting resistor pin. Also pro-
grams the DAC current step size. (see application in-
formation for programming the frequency)
Pin 9:
GND Chip ground.
Pin 10:
UVLO Programmable Under Voltage Lock-
Out. This pin may be connected to the MOSFET driver
supply through a voltage divider to inhibit the SC2422A
until the drivers are on. The UVLO comparator trip
point is 1.5V.
Pin 11:
OC- Input current sense, negative input. This
pin is connected to the input supply side of the current
sense resistor.
Pin 12:
OUT2 PWM output for phase 2. Drives exter-
nal Power MOSFET driver.
Pin 13:
OUT1 PWM output for phase 1. Drives exter-
nal Power MOSFET driver.
Pin 14:
OC+ Input current sense positive input. This
pin is connected to MOSFET side of the current sense
resistor.
Pin 15:
BGOUT Soft start and reference. Bypass to
ground (GSEN) with a .022μF - 0.1μF capacitor to im-
plement soft start in conjunction with internal 3K
re-
sistor. To ensure output voltage accuracy, the maxi-
mum current source/sink from this pin should be lim-
ited to 0.5 uA.
Pin 16:
VCC Chip positive supply.
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