rt9278 Richtek Technology Corporation, rt9278 Datasheet - Page 5

• Manufacturer Part Number: rt9278
• Description: High Efficiency Boost Converter High Power White Driver
• Manufacturer: Richtek Technology Corporation

DS9278-04 August 2007
Functional Pin Description
Function Block Diagram
Exposed Pad (11) GND
Pin No.
10
1
2
3
4
5
6
7
8
9
COMP
GND
VDD
LFB
EN
FB
FB
COMP
GND
EN
LX
VOUT
VDD
PGND
LDRI
LFB
Pin Name
V
V
REF
REF
= 0.8V
= 0.2V
Shutdown
Oscillator
Control
and
Error
AMPLIFIER
Feedback Input Pin.
Feedback Compensation Pin.
Ground.
Enable Input Pin
Switch Node.
Output Pin
Device Input Power Pin.
Power Ground.
Linear Controller Driver Output.
Linear Controller Feedback Input.
The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
-
+
-
+
Compen-
Preliminary
sation
Slope
Error
Comparator
-
+
Pin Function
Current
Control
Sense
Driver
Logic
and
VOUT
RT9278
LX
PGND
LDRI
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