IP3527A [SEME-LAB]
REGULATING PULSE WIDTH MODULATORS; 调节脉冲宽度调制器
| 型号： | IP3527A |
| 厂家： | 
SEME LAB |
| 描述： | REGULATING PULSE WIDTH MODULATORS |
| 文件： | 总6页 (文件大小：67K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IP1525A SERIES
IP1527A SERIES
SEME
LAB
TOP VIEW
INV. INPUT
N. I. INPUT
SYNC
1
2
3
4
5
6
7
8
16 VREF
REGULATING
PULSE WIDTH
MODULATORS
VIN
15
14
13
12
OUTPUT B
VC
OSC. OUTPUT
CT
GROUND
FEATURES
• 8 to 35V operation
RT
11 OUTPUT A
DISCHARGE
SOFT START
10 SHUTDOWN
• 5.1V reference trimmed to ±1%
• 100Hz to 500kHz oscillator range
• Separate oscillator sync terminal
• Adjustable deadtime control
• Internal soft start
COMPENSATION
9
J Package – 16 Pin Ceramic DIP
N Package – 16 Pin Plastic DIP
D Package – 16 Pin Plastic (300) SOIC
• Input undervoltage lockout
• Latching PWM to prevent multiple pulses
• Dual source/sink output drivers
Order Information
Part
Number
J–Pack
16 Pin
N–Pack
16 Pin
D–16
16 Pin
Temp.
Range
Note:
To order, add the package identifier to the part number.
eg.
IP1525AJ
IP3527AD–16
IP1525A
IP1527A
IP3525A
IP3527A
✔
✔
✔
✔
-55 to +125°C
-55 to +125°C
0 to +70°C
✔
✔
✔
✔
0 to +70°C
ABSOLUTE MAXIMUM RATINGS (T
= 25°C unless otherwise stated)
case
+V
Input Voltage
+40V
+40V
IN
Collector Voltage
Logic Inputs
–0.3 to +5.5V
Analogue Inputs
–0.3 to +V
500mA
IN
Output Current, Source or Sink
Reference Output Load Current
Oscillator Charging Current
Power Dissipation
Internally Limited
5mA
P
P
T = 25°C
1W
D
D
J
A
Derate @ T > 50°C
10mW/°C
A
Power Dissipation
T = 25°C
2W
C
Derate @ T > 25°C
16mW/°C
C
T
T
T
Operating Junction Temperature
Storage Temperature Range
Lead Temperature
See Ordering Information
–65 to +150°C
+300°C
STG
L
(soldering, 10 seconds)
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
IP1525A SERIES
IP1527A SERIES
SEME
LAB
DESCRIPTION
The IP1525A and IP1527A families of PWM switching regulator control circuits offer improved performance and lower
parts count when used in designing switching power supplies. Included are 5.1 volt reference, error amplifier, adjustable
dead-time oscillator with synchronisation capability, latched PWM comparator, totem-pole output drivers, shutdown, soft
start, and undervoltage lockout.
The IP1525A and IP1527A differ only in output phasing. The IP1525A output is low when “off”, while the IP1527A
output is high when “off”.
BLOCK DIAGRAM
VREF
16
V
C
13
15
12
REFERENCE
REGULATOR
+VIN
U.V.
LOCKOUT
GND
11 OUTPUT A
TO INTERNAL
CIRCUITRY
FLIP
3
6
OSC. OUTPUT FLOP
SYNC
RT
4
Q
14 OUTPUT B
OSCILLATOR
5
7
CT
Q
DISCHARGE
IP1525A OUTPUT STAGE
V
C
9
R
13
COMPENSATION
S
+VIN
PWM
LATCH
1
2
INV.
INPUT
11 OUTPUT A
N.I.
INPUT
ERROR
AMP
50µA
8
VREF
SOFT START
SHUTDOWN
5kΩ
10
14 OUTPUT B
5k
Ω
IP1527A OUTPUT STAGE
RECOMMENDED OPERATING CONDITIONS
IN
V
Input Voltage
+8 to +35V
Collector Voltage
+4.5 to +35V
0 to 100mA
Sink/Source Load Current (Steady State)
Sink/Source Load Current (Peak)
Reference Load Current
0 to 400mA
0 to 20mA
Oscillator Frequency Range
Oscillator Timing Resistor
Oscillator Timing Capacitor
Deadtime Resistor Range
Operating Ambient Temperature Range
100Hz to 400kHz
2kΩ to 200kΩ
470pF to 0.1µF
0 to 500Ω
R
C
T
T
IP1525A / IP1527A
IP3525A / IP3527A
–55 to +125°C
0 to +70°C
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
IP1525A SERIES
IP1527A SERIES
SEME
LAB
ELECTRICAL CHARACTERISTICS (T = Over Operating Temperature Range unless otherwise stated)
J
IP1525A
IP3525A
IP1527A
IP3527A
Parameter
Test Conditions
Min.
Typ. Max. Min.
Typ. Max.
Units
REFERENCE SECTION
Output Voltage
T = 25°C
5.05
5.10
2
5.15
10
5.0
5.1
2
5.2
20
V
J
Line Regulation
V
= 8 to 35V
IN
mV
Load Regulation
I = 0 to 20mA
5
50
5
50
L
Temperature Stability
Total Output Variation
Short Circuit Current
Output Noise Voltage
20
50
20
50
mV
V
Over Line, Load and Temp.
5.0
5.2
100
200
4.95
5.25
100
200
V
= 0
80
40
80
40
mA
REF
f = 10 Hz to 10kHz
µVrms
mV
Long Term Stability
1
10
1
50
kHr
OSCILLATOR SECTION 2
Initial Accuracy
2
6
1
2
1
6
2
Voltage Stability
Temperature Stability
Minimum Frequency
Maximum Frequency
Current Mirror
V
= 8 to 35V
0.3
3
%
IN
6
3
6
R = 200kΩ
C = 0.1µF
90
120
90
600
2.0
3.5
0.5
2.0
1.0
120
Hz
kHz
mA
V
T
T
R = 2kΩ
C = 470pF
400
1.7
3.0
0.3
1.2
600
2.0
3.5
0.5
2.0
1.0
400
1.7
3.0
0.3
1.2
T
T
I
= 2mA
2.2
2.2
RT
Clock Amplitude
Clock Width
T = 25°C
1.0
2.8
2.5
1.0
2.8
2.5
µs
J
Sync Threshold
Sync Input Current
V
Sync Voltage = 3.5V
mA
ERROR AMPLIFIER SECTION 3
Input Offset Voltage
Input Bias Current
0.5
1
5
10
1
2
1
10
10
1
mV
µA
Input Offset Current
DC Open Loop Gain
Gain Bandwidth Product
R ≥ 10MΩ
60
1
75
2
60
1
75
2
dB
L
T = 25°C
MHz
J
NOTES
1. Test Conditions unless otherwise stated:
VIN = 20V
3. Error Amplifier Section Test Condition:
VCM = 5.1V
TJ = –55 to +125°C for IP1525A / IP1527A
4. Output Driver Section Test Condition:
VC = 20V
TJ = 0 to +70°C
2. Oscillator Section Test Conditions:
fOSC = 40kHz (RT = 3.6kΩ , CT = 0.01µF , RD = 0)
for IP3525A / IP3527A
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
IP1525A SERIES
IP1527A SERIES
SEME
LAB
ELECTRICAL CHARACTERISTICS (T = Over Operating Temperature Range unless otherwise stated)
J
IP1525A
IP3525A
IP1527A
IP3527A
Parameter
Test Conditions
Min.
Typ. Max. Min.
Typ. Max.
Units
ERROR AMPLIFIER SECTION (cont.) 3
Output Low Level
0.2
5.6
75
0.5
0.2
5.6
75
0.5
V
Output High Level
3.8
60
50
3.8
60
50
Common Mode Rejection
Supply Voltage Rejection
V
= 1.5 to 5.2V
CM
dB
V
= 8 to 35V
60
60
IN
PWM COMPARATOR
Minimum Duty Cycle
Maximum Duty Cycle
Input Threshold
V
V
– V
≥ 150mV
≥ 150mV
0
0
PIN1
PIN2
PIN2
PIN1
%
– V
45
49
0.9
45
49
0.9
Zero Duty Cycle
Max. Duty Cycle
0.6
0.6
V
Input Threshold
3.3
3.6
1.0
3.3
3.6
1.0
Input Bias Current
0.05
0.05
µA
SHUTDOWN SECTION
Soft Start Current
V
V
= 0V
= 2V
25
50
0.4
1.3
0.1
0.2
80
0.6
2.0
1.0
0.5
25
50
0.4
1.3
0.1
0.2
80
0.6
2.0
1.0
0.5
µA
SHUTDOWN
SHUTDOWN
Soft Start Low Level
Shutdown Threshold
Shutdown Input Current
Shutdown Delay
V
To Outputs
0.6
0.6
V
V
= 2.5V
= 2.5V
mA
SHUTDOWN
T = 25°C
µs
SHUTDOWN
J
OUTPUT DRIVERS (each output) 4
I
I
I
I
= 20mA
0.2
1.0
19
18
7
0.4
2.0
0.2
1.0
19
18
7
0.4
2.0
SINK
SINK
Output Low Level
Output High Level
V
V
= 100mA
= 20mA
= 100mA
= High
18
17
5
18
17
5
SOURCE
SOURCE
Undervoltage Lockout
Output Leakage
Rise Time
V
V
8
8
V
COMP
= 35V
200
600
300
200
600
300
µA
C
C = 1nF
T = 25°C
100
50
100
50
L
J
ns
Fall Time
C = 1nF
T = 25°C
J
L
TOTAL STANDBY CURRENT
= 35V
Supply Current
V
10
20
10
20
mA
IN
NOTES
1. Test Conditions unless otherwise stated:
VIN = 20V
3. Error Amplifier Section Test Condition:
VCM = 5.1V
TJ = –55 to +125°C for IP1525A / IP1527A
4. Output Driver Section Test Condition:
VC = 20V
TJ = 0 to +70°C
2. Oscillator Section Test Conditions:
fOSC = 40kHz (RT = 3.6kΩ , CT = 0.01µF , RD = 0)
for IP3525A / IP3527A
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
IP1525A SERIES
IP1527A SERIES
SEME
LAB
APPLICATIONS INFORMATION
Q 1
+ VSUPPLY
TO OUTPUT FILTER
+ VSUPPLY
R 1
R 2
R 1
13
13
C 1
T 1
Q 1
+ VC
+ VC
A
B
A
B
11
14
11
R 2
C 2
IP1525A
IP1525A
Q 2
14
GND
GN D
R 3
12
12
RETURN
RETURN
For single–ended supplies, the driver outputs are grounded.
The VC terminal is switched to ground by the totem–pole
source transistors on alternate oscillator cycle.
In conventional push–pull bipolar designs, forward base drive
is controlled by R1–R3. Rapid turn–off times for the power
devices are achieved with speed–up capacitors C1 and C2.
+ VSUPPLY
+ VSUPPLY
Q 1
R 1
C 1
T 1
13
13
R 1
+ VC
T2
A
Q 1
T 1
+ VC
11
A
11
IP1525A
Q2
IP1525A
Q 2
B
C 2
14
B
GN D
14
GN D
R 2
12
12
RETURN
RETURN
The low source impedance of the output drivers provides
rapid charging of power FET input capacitance while minimis-
ing external components.
Low power transformers can be driven directly by the
IP1525A. Automatic reset occurs during deadtime when both
ends of the primary winding are switched to ground.
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
IP1525A SERIES
IP1527A SERIES
SEME
LAB
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Charge Time vs
R and C
Oscillator Discharge Time vs.
R and C
T
T
D
T
500
400
300
200
100
0
200
100
50
F
F
µ
µ
F
1
2
µ
1
F
F
0
0
n
.
.
0
n
.
2
5
0
0
20
10
5
=
=
=
=
=
C
C
C
C
C
6
5
7
R
D
2
1
RT
C
T
0.5
2
5
20
50
0.2
1
10
100 200
1
2
5
10 20
50 100 200 500
1
2
5
10
ms ms
ms ms
DISCHARGE TIME
(µs)
CHARGE TIME
(µs)
Error Amplifier Open–Loop
Frequency Response
IP1525A Output Saturation
Characteristics
4
3
2
1
0
100
80
60
40
20
0
VIN = 20V
TA = 25˚C
P
RZ = 20k
Ω
SOURCE SAT, V - V
OH
C
1
2
9
CP
RZ
SINK SAT, V
OL
-20
0.01
0.02 0.03
0.05 0.07 0.1
0.2
0.3
0.5 0.7
1
1
100
1k
10k
100k
1M
10M
10
OUTPUT CURRENT, SOURCE or SINK (A)
FREQUENCY (Hz)
Prelim. 3/95
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
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