SG3525ADWG ON Semiconductor, SG3525ADWG Datasheet - Page 6

• Manufacturer Part Number: SG3525ADWG
• Description: IC PWM SMPS CONTROLLER 16-SOIC
• Manufacturer: ON Semiconductor

Specifications of SG3525ADWG

• Pwm Type: Voltage Mode
• Number Of Outputs: 2
• Frequency - Max: 400kHz
• Duty Cycle: 49%
• Voltage - Supply: 8 V ~ 35 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Frequency-max: 400kHz
• Topology: Half-Bridge, Push-Pull
• Output Current: 400 mA
• Switching Frequency: 400 KHz
• Duty Cycle (max): 49 %
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Fall Time: 50 ns
• Mounting Style: SMD/SMT
• Rise Time: 100 ns
• Synchronous Pin: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Discharge
Sync
200
100
100
−20
5.0
2.0
V
GND
50
20
10
80
60
40
20
R
C
ref
0
1.0
T
T
2.0
7
12
16
5
Q2
6
3
Figure 3. Oscillator Charge Time versus R
5.0 10
Q1
10
Figure 5. Error Amplifier Open Loop
Q4
1.0k
Figure 7. Oscillator Schematic
5.0pF
Q7
Q3
100
20 50
400mA
2.0k
Frequency Response
23k
Q5
Q6
1.0 k
f, FREQUENCY (Hz)
CHARGE TIME (ms)
100 200 500 1000 2000 5000 10,000
Q8
Q10
Q9
2.0k
10 k
1.0k
R
Z
14k
Q11
= 20 k
100 k
Q12
7.4k
1
2
1.0 M
6
25k
−
+
R
T
5
* R
Q13
10 M
Q14
3.0k
D
= 0 W
http://onsemi.com
R
9
C
D
OSC Output
T
R
*
C
T
Z
P
Blanking
To Output
Ramp
To PWM
SG3525A
7
4
250
6
500
400
300
200
100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
Noninverting
0
0
0.01
0.2
Inverting
Figure 4. Oscillator Discharge Time versus R
Input
Input
2
1
200mA
V
T
0.5
0.02 0.03
CC
J
= +25 C
I
Q1
O,
Figure 8. Error Amplifier Schematic
= +20 V
OUTPUT SOURCE OR SINK CURRENT (A)
Figure 6. Output Saturation
1.0
Q2
2.0
DISCHARGE TIME (ms)
0.05 0.07 0.1
Characteristics
15
Q3
V
100mA
CC
5.0
Q4
Sink Sat, (V
10
0.2
20
Source Sat, (V
5.8V
OL
0.3
9
)
30
Compensation
50
0.5 0.7 1.0
To PWM
Comparator
C
100 200
−V
OH
D
)