MC34129D Freescale Semiconductor, MC34129D Datasheet - Page 9

• Manufacturer Part Number: MC34129D
• Description: IC CTLR CURRENT MODE 14-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC34129D

• Applications: Telecommunications
• Current - Supply: 2.5mA
• Voltage - Supply: 4 V ~ 12 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1707365A

MOTOROLA ANALOG IC DEVICE DATA
C Soft–Start
Sync/Inhibit Input
C T
R T
Start/Run
Sync/Inhibit Input
Output
Feedback/PWM Input
Capacitor C T
“Reset” Input
Drive Output
12
6
5
4
7
“Set” Input
Ramp Input
Latch
Latch
14.3 V
V CC
20 V
1.0 A
2.5V Reference
Fault Timer
Oscillator
R
+
–
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V CC
R
1.25V
Figure 18. Representative Block Diagram
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PWM
Comparator
Figure 19. Timing Diagram
MC34129 MC33129
275mV
R
S
Latch
1.95V
+
–
+
–
Q
+
+
=
Soft–Start
Buffer
Sink Only
Positive True Logic
+
–
+
–
80 A
Comparator
Start/Run
V CC
Undervoltage
Lockout
Error Amp
3.6V
Reference
1.25V
7.0V
+
V CC
+
–
14.3V
600 s Delay
Start/Run
Output
V CC
11
13
10 Inverting
14
8
9 Noninverting
1 Drive Output
2
3
Ramp Input
Input
Input
Feedback/PWM
Input
Drive
Gnd
V in = 20V
Q1
R S
9