MC33025 Motorola, MC33025 Datasheet - Page 7

• Manufacturer Part Number: MC33025
• Description: High Speed Double-Ended PWM Controller
• Manufacturer: Motorola

MOTOROLA ANALOG IC DEVICE DATA
Error Amp Output
Comparator
R T
Soft–Start
Output A
Output B
Noninverting Input
Error Amp Output
Ramp
Clock
PWM
C T
Inverting Input
C T
Soft–Start
C SS
Ramp
Clock
V ref
16
4
5
6
7
3
2
1
8
1.25 V
Error
Amp
Oscillator
Comparator
PWM
+
9.0 A
Figure 18. Representative Block Diagram
Q
Figure 19. Current Limit Operating Waveforms
R
S
4.2 V
Soft–Start Latch
MC34025 MC33025
UVLO
V ref
PWM Latch
10
Reference
Regulator
R
S
Q
Ground
0.5 V
Flip Flop
Steering
T
9.2 V
Q
Q
UVLO
V CC
Shutdown
Current
Limit
1.0 V
1.4 V
15
13
14
11
12
9
V CC
V C
Output B
Output A
Current Limit/
Shutdown
Power Ground
V CC
V in
7