MP1011A 查看數據表（PDF） - Monolithic Power Systems
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MP1011A Datasheet PDF : 6 Pages
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MP1011A
Cold Cathode Fluorescent Lamp Driver
Pin Description
Pin # Pin Name
1
Bright
2
I sense
3
Burst
4
Enable
5
Vdr
6
Vcc
7
OutL
8
NC
9
PGND
10
BstL
11
BstR
12
PGND
13
NC
14
OutR
15
Vcc
16
Vdr
17
Vref
18
Comp
19
Open lamp
20
AGND
Pin Function
Dimming Control: 0 volts is full Dim and 2V is full brightness
Lamp current feedback sense input.
To use for burst mode, the pin is switched between 0V and 5V
When not using burst mode, then pin must be tied to ground.
The enable will turn the chip on/off. Do not float this pin.
Internally generated MOSFET gate drive supply voltage
Power Supply input
Output to Load ( tank circuit )
No Connect
Power Ground
Regulated output voltage for boost cap on phase L
Regulated output voltage for boost cap on phase R
Power Ground
No Connect
Output to Load ( tank circuit )
Power Supply input
Internally connected to Vdr (pin 5). This pin must be left open.
Reference voltage output
Loop compensation cap
Latching shutdown for open lamp or low battery
Small signal ground
Functional Block Diagram:
Bright
Comp
Vr
Isense
Mp1
A1 Mn1
+
-
Mp2
Mp3
Mn2
A2
+
-
Ton
C1
+
CT
-
Rsense
A
CbstL
Vcc
CbstR
Vcc
Vref
VdrL
BstL VccL OutL OutR
6.2 Volt
Regulator
.
Vr 5.1 Volt
Driver
Regulator .
Thermal
Shutdown
.
Control
.
Logic
.
.
Driver
.
.
.
.
Current
Sensing
VccR BstR VdrR
Driver
Driver
Open Lamp Enable Burst AGND
PGND
PGND
A
MPS, Inc 3777 Stevens Creek Blvd.
Suite 400 Santa Clara, 95051-7364 USA
Tel (408) 243-0088, Fax (408) 243-0099
www.monolithicpower.com
Revision 1.7
3
April, 2001
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