LC79451KB Datasheet, PDF (7/38 Pages) ON Semiconductor – Controller and Driver

LC79451KB
5-3. Electrical Characteristics
DC Characteristics
(Case without the special mention VDD = +2.5V, VDD2 = +2.7V, VSS = 0V, Ta=+25°C)
Parameter
Symbol
Condition
min
typ
max
Unit
Note
Input leak current
IIL
VIN = 0V to VDD
-1
-
1
μA
*1
Standby current VDD
IDDS
All Circuit Stops
0
-
1
μA
*2
Standby current VDD2
IDD2S
(RESET = L)
0
-
1
μA
*2
Operating current VDD
IDD
SPI (10MHz)
-
400
480
μA
Operating current VDD2
IDD2
-
30
36
μA
*3
VOH
IOUT = -0.5mA
VDD - 0.36
VDD - 0.2
VDD
V
*4
Output voltage
VOL1
IOUT = +0.5mA
0
0.1
0.18
V
*4
VOL2
IOUT = +3mA
0
-
0.4
V
*5
<Output Driver Characteristics>
SEG output resistance VOUT2 RON1
VOUT = VOUT2 -0.5V
8
10
12
kΩ
SEG output resistance VSS
RON2
VOUT = +0.5V
7.5
10
12.5
kΩ
SEG output resistance VOUT3 RON3
VOUT = VOUT3 +0.5V
8
10
12
kΩ
<Charge-pump Characteristics>
Output voltage VOUT2
VOUT2NL1
VOUT2NL2
No Load
14.25
15.00
15.75
V
*6, *7
V
*6, *8
Output voltage VOUT3
VOUT3NL1
VOUT3NL2
No Load
-15.75
-15.00
-14.25
V
*6, *7
V
*6, *8
Load output voltage VOUT2
VOUT2L1
VOUT2L2
Load Current
= -100μA
0.90 × VOUT2
-
0.95 × VOUT2
-
VOUT2
VOUT2
V
*6, *7
V
*6, *8
Load output voltage VOUT3
VOUT3L1
VOUT3L2
Load Current
= +100μA
VOUT3
VOUT3
-
0.90 × VOUT3
V
*6, *7
-
0.95 × VOUT3
V
*6, *8
Load voltage ratio regulation
VRATIO
0.97
1
1.03
-
*6, *9
<Oscillator Characteristics>
Oscillator frequency
VDD = 1.6V to 3.6V
Fclk
31.04
VDD2 = 1.8V to 3.6V
32.00
32.96
kHz *10
<Discharge Characteristics>
Discharge resistance VOUT2 RDON1
VOUT2 = +15V
8
10
12
kΩ
*11a
Discharge resistance VOUT3 RDON2
VOUT3 = -15V
8
10
12
kΩ
*11b
Note: *1. For RESET, SCL, SDA, CS, ID1, ID2, IFSEL, SPIDRW pin.
*2. The maximum current is prescribed with the limit value of the measuring instrument.
*3. The state of the circuit as follows.
Oscillator operates, charge-pump operates, output driver stops (No load), charge-pump voltage is in a stable
state.
Charge-pump frequency 1kHz
(control register 1 : CP_F10 = 0, CP_F11 = 0, CP_F12 = 0)
Charge-pump reference voltage 2.5V (control register 2 : VREGSEL=1)
*4. For BUSY, DAOUT pin.
*5. For SDA pin.
*6. Use external capacitors of the recommended capacitance value.
*7. Charge-pump frequency 32kHz
(control register 1 : CP_F10 = 1, CP_F11 = 1, CP_F12 = 1)
Charge-pump reference voltage 1.25V (control register 2 : VREGSEL = 0)
*8. Charge-pump frequency 32kHz
(control register 1 : CP_F10 = 1, CP_F11 = 1, CP_F12 = 1)
Charge-pump reference voltage 2.5V (control register 2 : VREGSEL = 1)
*9. The change ratio of the charge-pump voltage by the load.
(Output voltage VOUT2/Output voltage VOUT3) / (Load output voltage VOUT2/Load output voltage
VOUT3)
*10. Charge-pump operates.
*11. Charge-pump stops.
(*11a) Between VOUT2 and VSS.
(*11b) Between VOUT3 and VSS.
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