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參數(shù)資料
| 型號： | SC1405TS.TR |
| 廠商： | Semtech Corporation |
| 英文描述： | HIGH SPEED SYNCHRONOUS POWER MOSFET SMART DRIVER |
| 中文描述： | 高速同步功率MOSFET的智能驅(qū)動 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 133K |
| 代理商： | SC1405TS.TR |
SC1405
HIGH SPEED SYNCHRONOUS POWER
MOSFET SMART DRIVER
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
August 31, 2000
PIN DESCRIPTION
5
PIN CONFIGURATION
NOTE:
(1) All logic level inputs and outputs are open collector TTL compatible.
Pin #
Pin Name
Pin Function
1
OVP_S
Overvoltage protection sense. External scaling resistors required to set
protection threshold.
2
EN
When high, this pin enables the internal circuitry of the device. When
low, TG, BG and PRDY are forced low and the supply current (5V) is
less than 10μA.
3
GND
Logic GND.
4
CO
TTL-level input signal to the MOSFET drivers.
5
S_MOD
When low, this signal forces BG to be low. When high, BG is not a
function of this signal.
6
DELAY_C
Sets the additional propagation delay for BG going low to TG going high.
Total propagation delay= 20ns + 1ns/pF.
7
PRDY
This pin indicates the status of 5V. When 5V is less than 4.4V(typ) this
output is driven low. When 5V is greater than or equals to 4.4V(typ) this
output is driven to 5V level. This output has a 10mA drive capability and
10μA sink capability.
8
V
CC
+5V supply. A .22-1μF ceramic capacitor should be connected from 5V
to PGND very close to this pin.
9
BG
Output drive for the synchronous MOSFET.
10
PGND
Power ground. Connect to the synchronous FET power ground.
11
DSPS_DR
Dynamic Set Point Switch Drive. TTL level output signal. When S_MOD
is high, this pin follows the BG driver pin voltage.
12
DRN
This pin connects to the junction of the switching and synchronous
MOSFET’s. This pin can be subjected to a -2V minimum relative to
PGND without affecting operation.
13
TG
Output gate drive for the switching (high-side) MOSFET.
14
BST
Bootstrap pin. A capacitor is connected between BST and DRN pins to
develop the floating bootstrap voltage for the high-side MOSFET. The
capacitor value is typically between 0.1μF and 1μF (ceramic).
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