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부품번호 | CS3524A 기능 |
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기능 | Voltage Mode PWM Control Circuit | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 8 페이지수
CS3524A
Voltage Mode
PWM Control Circuit with
200 mA Output Drivers
The CS3524A PWM control circuit retains the same versatile
architecture of the industry standard CS3524 (SG3524) while adding
substantial improvements.
The CS3524 is pin−compatible with “non−A” versions, and in most
applications can be directly interchanged. The CS3524A, however,
eliminates many of the design restrictions which had previously
required additional external circuitry.
The CS3524A includes a precision 5.0 V reference trimmed to ±1%
accuracy (eliminating the need for potentiometer adjustments), an
error amplifier with an output voltage swing extending to 5.0 V, and a
current sense amplifier useful in either the ground or power supply
output lines. The uncommitted 60 V, 200 mA NPN output pair greatly
enhances the output drive capability.
The CS3524A features an undervoltage lockout circuit which
disables all internal circuitry (except the reference) until the input
voltage has risen to 8.0 V. This holds standby current low until
turn−on, and greatly simplifies the design of low power, off−line
supplies. The turn−on circuit has approximately 600 mV of hysteresis
for jitter free activation.
Other improvements include a PWM latch that insures freedom
from multiple pulsing within a period, even in noisy environments;
logic to eliminate double pulsing on a single output, a 200 ns external
shutdown capability, and automatic thermal protection from excessive
chip temperature. The oscillator circuit is usable to 500 kHz and is
easier to synchronize with an external clock pulse.
Features
• Precision Reference Internally Trimmed to ±1%
• Current Limit
• Undervoltage Lockout
• Start−Up Supply Current < 4.0 mA
• Output to 200 mA
• 60 V Output Capability
• Wide Common−Mode Input Range for Error and Current Limit
Amplifiers
• PWM Latch Insures Single Pulse per Period
• Double Pulse Suppression
• 200 ns Shutdown
• Guaranteed Frequency
• Thermal Shutdown
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16
1
DIP−16
N SUFFIX
CASE 648
MARKING
DIAGRAMS
16
CS3524A
AWLYYWW
1
16
1
SO−16L
DW SUFFIX
CASE 751G
16
CS3524A
AWLYYWW
1
A
WL, L
YY, Y
WW, W
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN CONNECTIONS
1
EA−
EA+
SYNC
ISENSE+
ISENSE−
RT
CT
GND
VREF
VIN
EB
VOUTB
VOUTA
EA
SHUTDOWN
COMP
ORDERING INFORMATION
Device
Package
Shipping
CS3524AGN16
DIP−16 25 Units/Rail
CS3524AGDW16
CS3524AGDWR16
SO−16L 46 Units/Rail
SO−16L 1000 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
1
Publication Order Number:
CS3524A/D
CS3524A
ELECTRICAL CHARACTERISTICS (continued) (0°C ≤ TA ≤ +70°C, VIN = VCC = 20 V; unless otherwise specified.)
Characteristic
Test Conditions
Min Typ Max
Current Limit Amplifier (continued)
Output Swing
VSENSE = VO; unless otherwise specified
Minimum Total Range
0.5
− 5.0
Open Loop Voltage Gain
Delay Time (Note 4)
Output Section (Each Output)
ΔVOUT = 1.0 to 4.0 V, RL ≥ 10 MΩ
ΔVIN = 300 mV
70 80 −
− 300 −
Collector Emitter Voltage
IC = 100 μA
Collector Leakage Current
VCE = 50 V
Saturation
IC = 20 mA
IC = 200 mA
Emitter Output Voltage
IE = 50 mA
Rise Time (Note 4)
TA = 25°C, R = 2.0 kΩ
Fall Time (Note 4)
TA = 25°C, R = 2.0 kΩ
Comparator Delay (Note 4)
TA = 25°C, VCOMP to VOUT
Shutdown Delay (Note 4)
TA = 25°C, VSHUT to VOUT
Shutdown Threshold
TA = 25°C, RC = 2.0 kΩ
Thermal Shutdown (Note 4)
−
4. These parameters are guaranteed by design but not 100% tested in production.
60 80 −
− 0.1 20
− 0.2 0.4
− 1.0 2.2
17 18 −
− 200 −
− 100 −
− 300 −
− 200 −
0.5 0.7 1.0
− 165 −
Unit
V
dB
ns
V
μA
V
V
V
ns
ns
ns
ns
V
°C
TYPICAL PERFORMANCE CHARACTERISTICS
80 RF = ∞
RF = 1 M Ω
60 RF = 300 kΩ
RF = 100 kΩ
40 RF = 30 kΩ
VIN = 20 V
TA = 25°C
20 RF is impedance to ground.
Values below 30 kΩ will
0
begin to limit the maximum
duty−cycle.
100 1 k 10 k 100 k
Frequency (Hz)
1M
Figure 2. Error Amplifier Voltage Gain vs.
Frequency Over RF
50
VIN = 20 V
40
RT = 2700 Ω
TA = 25°C
30
CT = 10 μF
20
CT = 1 μF
10
00 1 2 3 4
Input Voltage VIN
Figure 3. Duty Cycle vs. Input Voltage
5
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4
4페이지 −A−
16
1
H
G
CS3524A
PACKAGE DIMENSIONS
DIP−16
N SUFFIX
CASE 648−08
ISSUE R
9
B
8
FC
S
L
−T−
SEATING
PLANE
KJ
D 16 PL
0.25 (0.010) M T A M
M
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
INCHES
MILLIMETERS
DIM MIN MAX MIN MAX
A 0.740 0.770 18.80 19.55
B 0.250 0.270 6.35 6.85
C 0.145 0.175 3.69 4.44
D 0.015 0.021 0.39 0.53
F 0.040 0.70 1.02 1.77
G 0.100 BSC
2.54 BSC
H 0.050 BSC
1.27 BSC
J 0.008 0.015 0.21 0.38
K 0.110 0.130 2.80 3.30
L 0.295 0.305 7.50 7.74
M 0_ 10_ 0 _ 10 _
S 0.020 0.040 0.51 1.01
DA
16 9
SO−16L
DW SUFFIX
CASE 751G−03
ISSUE B
q
18
16X B
B
0.25 M T A S B S
14X e
SEATING
PLANE
T
C
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSIONS D AND E DO NOT INLCUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
MILLIMETERS
DIM MIN MAX
A 2.35 2.65
A1 0.10 0.25
B 0.35 0.49
C 0.23 0.32
D 10.15 10.45
E 7.40 7.60
e 1.27 BSC
H 10.05 10.55
h 0.25 0.75
L 0.50 0.90
q 0_ 7_
PACKAGE THERMAL DATA
Parameter
RΘJC
RΘJA
Typical
Typical
DIP−16
42
80
SO−16L
23
105
Unit
°C/W
°C/W
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7
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부품번호 | 상세설명 및 기능 | 제조사 |
CS3524A | Voltage Mode PWM Control Circuit with 200mA Output Drivers | Cherry Semiconductor Corporation |
CS3524A | Voltage Mode PWM Control Circuit | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |