MPS MP1011A Cold cathode fluorescent lamp driver Datasheet

MP1011A
Cold Cathode Fluorescent Lamp Driver
General Description
Features
The MP1011A is a Power IC offering a
complete solution for driving one or more
Cold Cathode Fluorescent Lamps (CCFL).
This Power IC converts unregulated DC voltage
to a nearly pure sine wave required to ignite and
operate the CCFL. Based on proprietary power
topology and patented control techniques, it
greatly increases the power conversion
efficiency. The MP1011A supports both analog
and burst mode dimming without any additional
external components. The MP1011A offers four
distinct performance advantages:
1. More light for less power
2. Small board implementation
3. Low EMI emission
4. Low cost off the shelf components
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Ordering Information
Applications
Part Number ∗
MP1011EMA
Package
TSSOP 20 pin
Temperature
-20°° C to + 85°°C
∗ For Tape & Reel use suffix - Z (e.g. MP1011EMA-Z)
•
•
•
•
•
•
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Integrated power switches
6.0 to 22v variable supply voltage with
regulated lamp current.
Rated 12W power output at 12V input
Open lamp regulation
Current and Voltage feedback control
Logic Level burst mode control
Thermal Shutdown
Supports Open/Short Lamp protection
Soft Start
Output is short circuit protected
Low lamp operating voltage for increasing
transformer or using smaller transformer
Allows Burst-Mode Operation
No ballast capacitor required
LCD backlight inverter for large portable
or desktop display.
Typical Application Circuit:
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
1
MP1011A
Cold Cathode Fluorescent Lamp Driver
Absolute Maximum Ratings:
Vcc
25 V
Power Dissipation
1.0 W
Logic Inputs
-0.7 V to 6.8V
Thermal resistance
140° C/W
Junction Temperature
150° C
Lead Temperature (Solder)
260° C
Operating Frequency
150KHz
Storage Temperature
–55° C to 150° C
Recommended Operating Conditions:
Input Voltage Vcc
Brightness Voltage
Enable
Operating Frequency
Operating Temperature
6.0V to 22V
0 to 2.0V
0 to 5.0 V
20KHz to 90KHz
-20° C to + 85° C
Electrical Characteristics (Unless otherwise specified Vcc=12v, Ta=25° C)
Parameters
Symbol
Reference Voltage
Output Voltage
Reference Current
Line Regulation
Load Regulation
Vref
Iref
Voltage Supply
Supply Current (quiescent)
Supply Current (operating)
Operating Range
Icc (off)
Icc (on)
Vcc
Shutdown Logic
Thermal Shutdown
Open Lamp Detect
Enable Voltage Low
Enable Voltage High
Burst Voltage Low
Burst Voltage High
Vol
Vil
Vih
Vil
Vih
Output Drivers
On Resistance
Short Circuit Current
Operating Frequency
Zero-Crossing Voltage
Ton(min)
Ton(min)
Brightness Control
Sense Full Brightness
Sense Full Dim
Lamp Current Regulation
Ron
Isc
Condition
Min
Typ
Max
Units
4.85
5.1
6.5V < VCC < 22 V
0 < Ire < 3.0 mA
5.35
3.0
30
30
V
mA
mV
mV
6.0V < Vcc < 22V
(Note 2)
10
2.5
22
µA
mA
V
Iref=3mA
1.0
145
1.2
1.4
0.6
2.0
0.8
2.4
(Note 1)
Vzc
Vcomp=0V, Vcc = 22V
Vcomp=0V, Vcc = 6V
Vsense
Vsense
1.8
6.0
Vbright= 2.0V
Vbright= 0V
6.0v < Vcc < 22v
0.10
20
0
500
900
357
83
°C
V
V
V
V
V
0.12
4
60
6
625
1200
0.15
90
10
750
1500
Ω
A
KHz
mV
nS
nS
375
92
2
393
101
5
mV
mV
%
Note 1: This parameter is guaranteed by design.
Note 2: See Leakage Inductance Guide lines for Minimum Operating Voltage (Table 2).
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
2
MP1011A
Cold Cathode Fluorescent Lamp Driver
Pin Description
Pin #
Pin Name
Pin Function
1
2
3
Bright
I sense
Burst
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Enable
Vdr
Vcc
OutL
NC
PGND
BstL
BstR
PGND
NC
OutR
Vcc
Vdr
Vref
Comp
Open lamp
AGND
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:
Rsense
A
CbstL
CbstR
Vcc
Bright
Comp
Isense
Vref
Vr
A1
VdrL
6.2 Volt
Regulator
Mp1
Mp2
Mn1
Mn2
Vr
Mp3
+
-
+
-
VccL
OutL
OutR
VccR
BstR
VdrR
.
Driver
5.1 Volt
Regulator
A2
BstL
Vcc
Driver
.
Thermal
Shutdown
Driver
Driver
.
.
Control
Logic
.
.
.
.
Current
Sensing
.
.
Ton
C1
CT
+
-
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
April, 2001
3
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
See Note
Below
Q1
Optional. Used to meet UL
requirements.
D1a
Rsd
D1
Rolpu
Q2
C_sd
C_olpu
D1b
Cul
Rul1
Rul2
C_comp
C_vref
JP1
4
3
2
1
Vcc
Burst
Enable
Gnd
C_opv
C_para
C_vccR
F1
C_vcc
FUSE
C_bstR
12
11
BstR
C_ser
1
T1
5
Lamp(+)
8
CON2
D2b
BstL
C_vccL
Ren2
1
2
Rbleed
C_bstL
Ren1
J1
10
NC
OutL
PGnd_L
9
8
7
Vdr
Enable
VCC
6
5
4
PGnd_R
13
NC
14
OutR
15
VCC
16
Vdr
17
Vref
18
comp
Burst
open lamp
ISense
Rser
4
MP1011
3
2
1
Bright
AGnd
20
4 HEADER
19
A
D2a
C_vdrL
C_sense
Rsense
C_en
A
A
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
MP1011A
Cold Cathode Fluorescent Lamp Driver
Table 1 Bill of Materials
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Qty
Description
Resistors
1
4.3KΩ, ±5%, SMD, 0805
1
100KΩ, ±5%, SMD, 0805
1
100KΩ, ±5%, SMD, 0805
2
1MΩ, ±5%, SMD, 0805
1
140Ω, ±1%, SMD, 0805
1
1KΩ, ±5%, SMD, 0805
1
2MΩ, ±5%, SMD, 0805
1
280KΩ, ±5%, SMD, 0805
Capacitors
2
10nF, 50V, Y5V, SMD
2
10nF, 16V, X7R, SMD
1
100pF 50V NPO
1
1uF 6.3V X7R
1
6.8nF 16V X7R
1
10pF, 3KV
1
0.22uF, 16V, Y5V, (optional)
1
2X.47uF 16V X7R
2
1uF 25V Y5V
1
10uF, 25V, Y5U, SMD, 1210
1
220nF, 10V Y5V, SMD
1
0.1uF, 10V, X7R, SMD
1
100nF, 10V, Y5Y, SMD
Semiconductors
4
Diode, BAV99L
2
Transistor, bipolar, 2N3904, SMD
Integrated Circuits
1
MP1011A, 20-pin TSSOP
Magnetics
1
Transformer*
Hardware
1
Fuse, 1A
Vendor / Part #
Designation
(For UL)
(For UL)
Rbleed
Ren1
Ren2
Rsd, Rolpu
Rsense
Rser
Rul1
Rul2
(for UL)
C_bstL, C_bstR
C_olpu, C_comp
C_en
C_sd
C_opv
C_para
C_sense
C_ser
C_vccR, C_vccL
C_vcc
C_vdrL
C_vref
Cul
D1b, D1a, D2b, D2a
Q1, Q2
Monolithic Power Systems
U2
T1
F1
*Transformer Sources:
Company
Toko
Part #
Darfon Electronics Corp.
Contact Vendor
FDK
TMP
CD-T-0836-520
BLC103B
Contact Vendor
Location
Saitama-Ken, Japan
Taoyuan 333, Taiwan
Yamaguchi, Japan
Taipei, Taiwan
MPS, Inc 3777 Stevens Creek Blvd.
Suite 400 Santa Clara, 95051-7364 USA
Tel (408) 243-0088, Fax (408) 243-0099
www.monolithicpower.com
Contact Info
http://www.toko.co.jp
+81-492-791611
+886-3-329-4141
http://www.fdk.co.jp
+886-2-8667-2081
Revision 1.7
April, 2001
5
MP1011A
Cold Cathode Fluorescent Lamp Driver
Table 2:
Leakage Inductance Guide Lines for Minimum Operating Voltage
Minimum Operating Supply
Voltage
6
7
8
9
10
Recommended Maximum Primary
Leakage Inductance*
38µH
42µH
45µH
47µH
49µH
∗ If the maximum primary leakage cannot be met, consult factory for alternatives.
Packaging Information
0.019(0.500)
0.031(0.800)
PIN 1 IDENT
0.169
0.246
0.177
0.258
(4.300)
(6.250)
(4.500)
(6.550)
1
OPTION BTM. E-PIN WITH THAILAND.
0.252(6.400)
0.259(6.600)
GAGE PLANE
0.039(1.000)
0.047(1.200)
0.002 (0.050)
0.041(1.050)
0.006 (0.150)
0.007(0.190)
o
0.031(0.800)
0.004(0.090)
0.008(0.200)
0.012(0.300)
MPS, Inc 3777 Stevens Creek Blvd.
Suite 400 Santa Clara, 95051-7364 USA
Tel (408) 243-0088, Fax (408) 243-0099
www.monolithicpower.com
o
2
0 - 8
0.010
0.018 (0.450)
(0.254)
0.029 (0.750)
Revision 1.7
April, 2001
6
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