LB1848MC-AH ON Semiconductor, LB1848MC-AH Datasheet - Page 5

• Manufacturer Part Number: LB1848MC-AH
• Description: lb1848mc series 7.5 v .8 a .82 w two phase...
• Manufacturer: ON Semiconductor

(Cautions)
Pay attention to following two points in an application where the capacitor to GND is connected to the SOF pin:
(1) Sudden startup of VCC power supply causes charging of the capacitor from the IC inside via the SOF pin at startup.
(2) To transfer from the drive mode to the standby mode by changing the ENA input from “H” to “L”, the capacitor is
During charging, the state equivalent to the one with the ENA input at “H” occurs, causing output of the corresponding
logic to the output pin, which may result in driving of the load. (The output time period is dependent on the capacity
of capacitor; about 2 ms for 0.01μF.)
charged from the IC inside via the SOF pin as in the case of above (1). During this charge period, the ENA input keeps
the “H” condition in IC. By changing IN1/IN2 input at this time point, the output can be changed. (The time period is
equal to that of (1) above.)
1.0
0.8
0.6
0.4
0.2
50
40
30
20
10
0
0
0
0
V CC =V IN , IN1 / 2 / 3 / 4=H / L / H / L
V CC =V IN =4.0V
1
0.1
2
I CC - V CC Characterstics
Power-supply voltage, V CC - V
0.2
Input current, I OUT - A
V OUT -- I OUT
3
0.3
4
5
0.4
GND
V CC
ENA
6
[SOF pin internal equivalent circuit diagram]
0.5
7
60kW
0.6
8
LB1848MC
0.7
9
R1
Q1
R2
SOF
External capacitor
280
240
200
160
120
80
40
0
0
Drive circuit
V CC =5V
1
Q2
2
Input voltage, V IN - V
3
I IN -- V IN
4
5
6
7
No.A2036-5/6
8
9