MP1026 – CCFL DRIVER FOR HANDHELD DISPLAY APPLICATIONS
ELECTRICAL CHARACTERISTICS (continued)
Batt = 14V, VDD = 5V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
Output Drivers
R(ON)OUTL,O
Switch On Resistance (4)
0.085
0.12
0.15
Ω
UTR
Ton(min) Vdd = 5V
Ton(min) Vdd = 5V
First Pulse Ton(min)
Vdd = 5V
First Pulse Ton(min)
Vdd = 5V
Batt = 4.5V, Vcomp = 0V
Batt = 14V, Vcomp = 0V
1800
350
ns
ns
Batt = 4.5V
8300
1300
ns
ns
Batt = 14V
Brightness Control
Sense Full Brightness
Sense Full Dim
Lamp Current Regulation
Burst Oscillator Sink Current
Burst Oscillator Peak
Voltage
V(IL)
V(IL)
V(Abrt) = 2.0V
V(Abrt) = 0V
4.5v < V(Batt) < 14V
360
100
385
115
3
410
130
mV
mV
%
I(Bos)
370
µA
V(Bos)
1.8
V
Fault Loop Control
Open Lamp Threshold
Secondary Current
Threshold
Vth(VLFB)
Vth(ISFB)
0
V
V
1.2
460
Fault Mode Comp Current
I(Cmp) V(VLFB) < 0V, V(ISFB) > 1.2V
µA
Note:
4) This parameter is guaranteed by design.
PIN FUNCTIONS
Pin #
Name Description
1
2
3
4
5
6
7
8
ABrt
IL
Bosc
DBrt
En
Vdd
Batt
OutL
Analog Dimming.
Lamp Current Feedback Sense Input.
Burst Oscillator Timing.
Burst Mode Dimming.
Chip Enable. Do not float this pin.
Supply Voltage.
Power Supply Input.
Output to Load (Tank Circuit).
9
PGnd Power Ground.
10
11
12
13
14
15
16
17
18
19
20
BtL
BtR
Regulated Output Voltage for Bootstrap Cap on Phase L.
Regulated Output Voltage for Bootstrap Cap on Phase R.
PGnd Power Ground.
OutR
Batt
Output to Load (Tank Circuit).
Power Supply Input.
Supply Voltage.
Vdd
Comp Loop Compensation Cap.
FT Fault Timer.
VLFB Open Lamp Detect (Lamp Voltage Feedback).
ISFB Shorted Lamp Detect (Secondary Current Feedback).
AGnd Small Signal Ground (Connect the Exposed Pad to Pin 20).
MP1026 Rev. 1.6
9/24/2007
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3
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