AZ494 Datasheet, PDF (2/12 Pages) List of Unclassifed Manufacturers – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

Advanced Analog Circuits
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
Pin Configuration
M Package / P Package
(SOIC-16 / DIP-16)
1IN +
1
1IN -
2
16
2IN +
15
2IN -
FEEDBACK
3
14
REF
DTC
4
CT
5
RT
6
13
OUTPUT CTRL
12
V_CC
11
C2
GND
7
10
E2
C1
8
9
E1
Top View
Figure 2. Pin Configuration of AZ494
Function Table
Input To Output Control
V_I = GND
V_I = V_ref
Output Function
Single-ended or parallel output
Normal push-pull operation
Functional Block Diagram
RT ⁶
5
CT
O scilla to r
Dead-Time Control
Comparator
DTC
1IN +
1IN -
4
0.12V
Error Amplifier 1
1
2
PWM
Comparator
2IN + ¹⁶
2IN - ¹⁵
Error Amplifier 2
0.7mA
3
FEEDBACK
Output CTRL
see Function Table
13
Pulse-Steering
Flip-Flop
D
CK
Reference
Regulator
Figure 3. Functional Block Diagram of AZ494
March. 2003
2
Data Sheet
AZ494
8 _C1
Q1
9 _E1
11 ^C2
Q2
10
E2
12
V_CC
14
REF
7
GND
Rev.1.0