SC4612HMLTRT Просмотр технического описания (PDF) - Semtech Corporation
Номер в каталоге
Компоненты Описание
производитель
SC4612HMLTRT Datasheet PDF : 18 Pages
| |||
SC4612H
Pin Descriptions
Pin #
MLPD
Pin #
SOIC
1,7
Pin Name
NC
1
2
ILIM
2
3
3
4
4
5
5
8
6
6
7
9
8
10
9
11
OSC
SS/EN
EAO
FB
VDD
GND
DL
DRV
10
12
BST
11
13
DH
12
14
PHASE
X
N/A
THERMAL PAD (GND)
Pin Function
No Connection
This pin can be used to modify the current limit threshold for the low side MOSFET RDS(ON)
sensing. Once the voltage drop across the bottom MOSFET is larger than the pro-
grammed value, current limit condition occurs, and the hiccup current limit protection is
activated.
Oscillator Frequency set pin. An external capacitor to GND will program the oscillator
frequency. See Table 1 “Frequency vs. C OSC “ to determine oscillator frequency.
Soft Start pin. Internal current source connected to a single external capacitor will deter-
mine the soft-start duration for the output. Inhibits the chip if pulled down.
Error Amplifier Output. A compensation network is connected from this pin to FB.
The inverting input of the error amplifier, used to sense the output voltage via a resistive
divider.
Main IC supply.
Ground.
Drive Low. Gate drive for the bottom MOSFET.
DRV supplies the external MOSFETs gate drive and the some internal circuitry. This pin
should be bypassed with a ceramic capacitor to GND. DRV is internally regulated from
the external supply connected to VDD. If VDD is below10V, the supply should be directly
connected to the DRV pin.
Supply for high side driver; can be directly connected to an external supply or to a boot-
strap circuit.
Drive High. Gate drive for the top MOSFET.
The return path for the high side gate drive, also used to sense the voltage at the phase
node for adaptive gate drive protection and the low-side RDS(ON) current sensing.
Pad for heatsinking purposes. Connect to ground plane using multiple vias.
Share Link: 