rt9603 ETC-unknow, rt9603 Datasheet - Page 2

• Manufacturer Part Number: rt9603
• Description: Synchronous-rectified Buck Mosfet Drivers
• Manufacturer: ETC-unknow

Typical Application Circuit
Functional Pin Description
RT9603
Note: The traces that run from the controller ISPx and ISNx pins, should be run together next to each other and Kelvin connected
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2
Pin No.
1
2
3
4
5
6
7
8
to the Q2. Place both R2 and R3 as close to the PWM Controller as possible.
Pin Name
PGND
DRVH
DRVL
VCC
BST
SW
NC
IN
INPUT
PWM
1uF
C1
10
R1
+12V
Floating bootstrap supply pin for the upper gate drive. Connect the bootstrap capacitor
between this pin and the SW pin. The bootstrap capacitor provides the charge to turn
on the upper MOSFET.
Accepts a logic control signal. Connect this pin to the PWM output of the controller.
If the PWM signal enters and remains within the shutdown window, the output drivers are
disabled and both MOSFET gates are pulled and held low.
No Internal Connection.
Supply Input. Connect to +12V supply. Place a bypass capacitor from this pin to PGND.
Lower gate drive output. Should be connected to the lower MOSFET gate.
Common Ground.
Upper driver return. Should be connected to the common node of upper and lower
MOSFETs. The SW voltage is monitored for adaptive shoot-through protection.
Upper gate drive output. Should be connected to the upper MOSFET gate.
4
3
2
1N4148
D1
VCC
NC
IN
PGND
BST
1
6
DRVH
DRVL
SW
8
7
5
C2
PHB95N03LT
Preliminary
1uF
1uF
C3
+12V
Q2
Q1
PHB83N03LT
Pin Function
1000uF/16V
C4
2uH
L1
2.4K
2.4K
R2
R3
C5
x1500uF
DS9603-00 November 2003
C6
x1500uF
VCORE
ISPx
ISNx