AZ494A/C(2009) Просмотр технического описания (PDF) - BCD Semiconductor
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AZ494A/C Datasheet PDF : 13 Pages
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PULSE-WIDTH-MODULATION CONTROL CIRCUITS
Pin Configuration
M/P Package
(SOIC-16/DIP-16)
1IN +
1
1IN -
2
FEEDBACK
3
DTC
4
CT
5
RT
6
GND
7
C1
8
16
2IN +
15
2IN -
14
REF
13
OUTPUT CTRL
12
VCC
11
C2
10
E2
9
E1
Figure 2. Pin Configuration of AZ494A/C (Top View)
Output Function Control Table
Signal for Output Control
VI = GND
VI = VREF
Output Function
Single-ended or parallel output
Normal push-pull operation
Data Sheet
AZ494A/C
Functional Block Diagram
RT 6
5
CT
Oscillator
Dead-Time Control
Comparator
4
DTC
+
0.12V
1
1IN +
1IN - 2
Error Amplifier 1
+
+
PWM
Comparator
2IN + 16
2IN - 15
Error Amplifier 2
+
0.7mA
3
FEEDBACK
OUTPUT CTRL
13
Pulse-Steering
Flip-Flop
D
CK
Reference
Regulator
8 C1
Q1
9 E1
11 C2
Q2
10
E2
12
VCC
14
REF
7
GND
Figure 3. Functional Block Diagram of AZ494A/C
Sep. 2009 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
2
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