MC34270 Datasheet, PDF (3/12 Pages) Motorola, Inc – LIQUID CRYSTAL DISPLAY AND BACKLIGHT INTEGRATED CONTROLLER

MC34270 MC34271
ELECTRICAL CHARACTERISTICS (VDD = 6.0 V, for typical values TA = Low to High [Note 1], for min/max values TA is
the operating ambient temperature range that applies, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
REFERENCE SECTION
Reference Voltage (TJ = 25°C)
Vref
1.225
1.250
1.275
V
Line Regulation (VDD = 5.0 V to 12.5 V)
Regline
–
2.0
10
mV
Load Regulation (IO = 0 to 120 µA)
Regload
–
2.0
10
mV
Total Variation (Line, Load and Temperature)
Vref
1.215
–
1.285
V
ERROR AMPLIFIERS
Input Offset Voltage (VCM = 1.25 V)
VIO
–
1.0
10
mV
Input Bias Current (VCM = 1.25 V)
IIB
–
120
600
nA
Open Loop Voltage Gain (VCM = 1.25 V, VCOMP = 2.0 V)
AVOL
80
100
–
dB
Output Voltage Swing
High State (IOH = –100 µA)
Low State (IOL = 100 µA)
BIAS VOLTAGE
V
VeOH
VA–1.5
4.0
5.5
VeOL
0
–
1.0
Voltage (VDD = 5.0 V to 12.5 V, IO = 0)
VA
4.6
5.0
5.4
V
OSCILLATOR AND PWM SECTIONS
Total Frequency Variation Over Line and Temperature
VDD = 5.0 V to 10 V, TA = 0° to 70°C, RT = 169 k
Duty Cycle at Each Output
Maximum
Minimum
Sync Input
Input Resistance (Vsync = 3.5 V)
Minimum Sync Pulse Width
OUTPUT MOSFETs
fOSC
kHz
90
115
140
DCmax
92
95
DCmin
–
–
%
–
0
Rsync
25
50
100
kΩ
Tp
–
1.0
–
µs
Output Voltage – “On”–State (Isink = 200 mA)
VOL
–
150
250
mV
Output Current – “Off”–State (VOH = 40 V)
IOH
–
0.1
1.0
µA
Rise and Fall Times
tr, tf
–
50
–
ns
EL DISCHARGE OUTPUT (ELD) AND DRV1
Output Voltage – “On”–State (Isink = 100 µA)
VOL
–
30
100
mV
Output Voltage – “On”–State (Isink = 50 mA)
VOL
–
2.0
2.5
V
Output Voltage – “Off”–State (Isource = –100 µA)
VOH
VDD–0.5
5.9
–
V
Output Voltage – “Off”–State (Isource = – 50 mA)
VOH
VDD–3.5
3.3
–
V
FEEDBACK ENABLE SWITCHES (DS1, DS2)
Output Voltage – “Low”–State (Isink = 1.0 mA)
VfeOL
–
10
100
mV
Output Current – “Off”–State (VOH = 12.5 V)
IfeOH
–
0.6
1.0
µA
SWITCHED VDD OUTPUT (SW1)
Output Voltage
Switch “On” (EN1 = 1, Isource = 100 µA)
Switch “Off” (EN1 = 0, Isink = 100 µA)
AUXILIARY VOLTAGE OUTPUTS
V
VswOH
5.5
5.9
6.0
VswOL
0
0.1
0.2
V0 Enable Switch
“On”–Resistance: VB to V0
“Off”–State Leakage Current (VB = 10 V)
V0 Voltage (VB = 30 V, Isource = 0 mA)
V0 Resistance (Isource = 4.0 mA)
Rds
0
2.0
10
Ω
Ilkg
0
0.1
2.0
µA
V0
29.5
29.9
30
V
R0
20
40
60
Ω
NOTE: 1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
MOTOROLA ANALOG IC DEVICE DATA
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