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AZ7500CP Datasheet

Pulse-Width-Modulation Controller

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Data Sheet
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
General Description
Features
AZ7500B/C
The AZ7500B/C is a voltage mode pulse width modu- · Stable 4.95V/5V Reference Voltage Trimmed to
lation switching regulator control circuit designed pri-
±1.0% Accuracy
marily for power supply control.
· Uncommitted Output TR for 200mA Sink or
Source Current
The AZ7500B/C consists of a reference voltage circuit, · Single-End or Push-Pull Operation Selected by
two error amplifiers, an on-chip adjustable oscillator, a
Output Control
dead-time control (DTC) comparator, a pulse-steering · Internal Circuitry Prohibits Double Pulse at Either
control flip-flop, and an output control circuit. The pre-
cision of voltage reference (VREF) is improved up to ±
·
Output
Complete PWM Control Circuit with Variable
1% through trimming and this provides a better output
Duty Cycle
voltage regulation. The AZ7500B/C provides for push- · On-Chip Oscillator With Master or Slave Opera-
pull or single-ended output operation, which can be
tion
selected through the output control.
The difference between AZ7500B and AZ7500C is that
they have 4.95V and 5V reference voltage respectively.
The AZ7500B/C is available in standard packages of
DIP-16 and SOIC-16.
Applications
· SMPS
· Back Light Inverter
· Charger
www.DataSheet4U.com
SOIC-16
DIP-16
Apr. 2006 Rev. 1. 2
Figure 1. Package Types of AZ7500B/C
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AZ7500CP Datasheet

Pulse-Width-Modulation Controller

No Preview Available !

PULSE-WIDTH-MODULATION CONTROL CIRCUITS
Pin Configuration
1IN +
1IN -
FEEDBACK
DTC
CT
RT
M/P Package
(SOIC-16/DIP-16)
1
16
2
15
3
14
4
13
5
12
6
11
2IN +
2IN -
REF
OUTPUT CTRL
VCC
C2
GND
7
10
E2
C1
8
9
E1
Figure 2. Pin Configuration of AZ7500B/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
AZ7500B/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
+
3
FEEDBACK
0.7mA
OUTPUT CTRL
13
Pulse-Steering
Flip-Flop
D
CK
Reference
Regulator
8 C1
Q1
9 E1
C2
11
Q2
10
E2
12
VCC
14
REF
7
GND
Figure 3. Functional Block Diagram of AZ7500B/C
Apr. 2006 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
2


Part Number AZ7500CP
Description Pulse-Width-Modulation Controller
Maker BCD Semiconductor
PDF Download

AZ7500CP Datasheet PDF






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