MP1011A
Cold Cathode Fluorescent Lamp Driver
Truth Table
Enable
L
H
L
H
Burst
X
H
X
L
Output L /Output R
High Z
0 volts ( Standby)
High Z
Normal Operation
Reference Design for Burst Mode Operation with Open Lamp Regulation and Shutdown
Q1
Optional. Used to meet UL
requirements.
Rsd
Rolpu
Q2
Cul
Rul1
Rul2
C_comp
C_vref
JP1
4
3
2
1
Vcc
Burst
Enable
Gnd
F1
C_vcc
FUSE
C_bstR
A
20
19
18
17
16
15
14
13
12
11
4 HEADER
C_vccR
C_sd
C_olpu
See Note
Below
D1a
D1
D1b
C_opv
C_para
Rser
C_ser
1
T1
5
VCC
AGnd
OutR
NC
Vdr
comp
BstR
Vref
open lamp
PGnd_R
Lamp(+)
J1
1
2
CON2
PGnd_L
MP1011
Enable
Burst
VCC
OutL
NC
Vdr
4
BstL
Rbleed
8
ISense
Bright
10
C_bstL
1
2
3
4
5
6
7
8
9
D2b
D2a
C_sense
Rsense
C_vccL
Ren1
Ren2
C_en
A
A
C_vdrL
Note:This circuitry is for 'lamp-out'
detection. If this feature is not needed,
remove the outlined components, short the
upper side of C para to Gnd and short
pins 17 and 19 of the MP1011.
For additional reference designs, please see MP1011UG demo board user’s guide
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
April, 2001
4
MPS [ MONOLITHIC POWER SYSTEMS ]
