LTC1255
U
TYPICAL APPLICATIO S
10 to 12 Cell Battery Switch and 5V Ramped Load Switch with
12µA Standby Current and Optional 3A Overcurrent Shutdown
18V TO 30V
FROM
1N5400
BATTERY
CHARGER
9.1V
0.033Ω*
MMBZ5239BL
IRFR024
IRFR024
SWITCHED
BATTERY
V
10 TO 12
CELL
BATTERY
PACK
IN
100k*
10k
0.22µF*
HIGH†
EFFICIENCY
SWITCHING
REGULATOR
+
V
OUT
12V
MMBZ5242BL
100µF
2N2222
10k
5V/1A
+
V
S
DS1
G1
100µF
V
LOGIC
LTC1255
GND
1N4148
100k
µP OR
CONTROL
LOGIC
IN1
IN2
DS2
G2
100k
1k
MTD3055EL
0.1µF
5V/1A
(SWITCHED)
LTC1255 • TA04
*OPTIONAL 3A OVERCURRENT SHUTDOWN
†SEE LTC1149 DATA SHEET FOR CIRCUIT DETAILS
Automotive Motor Direction and Speed Control with
Stall-Current Shutdown
14V
+
0.1µF
0.1µF
100k
10µF
50V
MR2535L
0.02Ω
V
S
DS1
G1
30k
5V
MTD3055E
12V
MMBZ5242B
LTC1255
GND
DIRECTION
DIRECTION
IN1
IN2
DS2
G2
30k
MOTOR SPEED
AND DIRECTION
CONTROL LOGIC
OR µP
MTD3055E
14V
DC MOTOR
12V
MMBZ5242B
PWM 1
PWM 2
100Ω
MTD3055EL
MTD3055EL
LTC1255 • TA05
11
Linear [ Linear ]
