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부품번호 | CS2845 기능 |
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기능 | Current Mode PWM Control Circuit | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 12 페이지수
CS2844, CS3844, CS2845,
CS3845
Current Mode PWM
Control Circuit with
50% Max Duty Cycle
The CS3844/45 provides all the necessary features to implement
off–line fixed frequency current–mode control with a minimum
number of external components.
The CS3844 family incorporates a new precision
temperature–controlled oscillator to minimize variations in frequency.
An internal toggle flip–flop, which blanks the output every other clock
cycle, limits the duty–cycle range to less than 50%. An undervoltage
lockout ensures that VREF is stabilized before the output stage is
enabled. In the CS2844/CS3844 turn on occurs at 16 V and turn off at
10 V. In the CS2845/CS3845 turn on is at 8.4 V and turn off at 7.6 V.
Other features include low start–up current, pulse–by–pulse current
limiting, and a high–current totem pole output for driving capacitive
loads, such as gate of a power MOSFET. The output is low in the off
state, consistent with N–channel devices.
Features
• Optimized for Off–Line Control
• Temp. Compensated Oscillator
• 50% Max Duty–Cycle Clamp
• VREF Stabilized Before Output Stage Is Enabled
• Low Start–Up Current
• Pulse–By–Pulse Current Limiting
• Improved Undervoltage Lockout
• Double Pulse Suppression
• 1.0% Trimmed Bandgap Reference
• High Current Totem Pole Output
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MARKING
DIAGRAMS
8
8
1
8
1
14
1
16
1
DIP–8
N SUFFIX
CASE 626
SO–8
D SUFFIX
CASE 751
CSx84yN
AWL
YYWW
1
8
384yD
ALYW
SO–14
D SUFFIX
CASE 751A
1
14
CSx84yD14
AWLYWW
1
16
SO–16L
DW SUFFIX
CASE 751G
CSx84yDW
AWLYYWW
1
x = 2 or 3
y = 4 or 5
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2001
June, 2001 – Rev. 3
1
Publication Order Number:
CS2844/D
CS2844, CS3844, CS2845, CS3845
ELECTRICAL CHARACTERISTICS (continued) (–25° ≤ TA ≤ 85° for CS2844/2845, 0° ≤ TA ≤ 70° for CS3844/CS3845.
VCC = 15 V*; RT = 10 kΩ, CT = 3.3 nF for sawtooth mode; unless otherwise stated.)
CS2842A/CS2843A CS3842A/CS3843A
Characteristic
Error Amp Section
Test Conditions
Min Typ Max Min Typ Max
Input Voltage
Input Bias Current
AVOL
Unity Gain Bandwidth
VCOMP = 2.5 V
VFB = 0
2.0 ≤ VOUT ≤ 4.0 V
Note 4.
2.45 2.50 2.55 2.42 2.50 2.58
– –0.3 –1.0 – –0.3 –2.0
65 90 – 65 90 –
0.7 1.0 – 0.7 1.0 –
PSRR
Output Sink Current
Output Source Current
VOUT High
VOUT Low
Current Sense Section
12 ≤ VCC ≤ 25 V
VFB = 2.7 V, VCOMP = 1.1 V
VFB = 2.3 V, VCOMP = 5.0 V
VFB = 2.3 V, RL = 15 kΩ to GND
VFB = 2.7 V, RL = 15 kΩ to VREF
60 70 – 60 70 –
2.0 6.0 – 2.0 6.0 –
–0.5 –0.8 – –0.5 –0.8 –
5.0 6.0 – 5.0 6.0 –
– 0.7 1.1 – 0.7 1.1
Gain
Notes 5 & 6.
2.85 3.00 3.15 2.85 3.00 3.15
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
Output Section
VCOMP = 5.0 V. Note 5.
12 ≤ VCC ≤ 25 V. Note 5.
VSENSE = 0
TJ = 25°C. Note 4.
0.9 1.0 1.1 0.9 1.0 1.1
– 70 –
– 70
–
– –2.0 –10 – –2.0 –10
– 150 300 – 150 300
Output Low Level
ISINK = 20 mA
ISINK = 200 mA
– 0.1 0.4 – 0.1 0.4
– 1.5 2.2 – 1.5 2.2
Output High Level
Rise Time
Fall Time
Total Standby Current
ISOURCE = 20 mA
ISOURCE = 200 mA
TJ = 25°C, CL = 1.0 nF. Note 4.
TJ = 25°C, CL = 1.0 nF. Note 4.
13 13.5
12 13.5
–
–
13 13.5
12 13.5
–
–
–
50 150
–
50 150
–
50 150
–
50 150
Startup Current
– – 0.5 1.0 – 0.5 1.0
Operating Supply Current
VCC Zener Voltage
PWM Section
VFB = VSENSE = 0 V,
RT = 10 kΩ, CT = 3.3 nF
ICC = 25 mA
– 11 17 – 11 17
– 34 –
– 34
–
Maximum Duty Cycle
– 46 48 50 46 48 50
Minimum Duty Cycle
– ––0––0
4. These parameters, although guaranteed, are not 100% tested in production.
5. Parameters measured at trip point of latch with VFB = 0.
6. Gain defined as: A = ∆VCOMP/∆VSENSE; 0 ≤ VSENSE ≤ 0.8 V.
*Adjust VCC above the start threshold before setting at 15 V.
Unit
V
µA
dB
MHz
dB
mA
mA
V
V
V/V
V
dB
µA
ns
V
V
V
V
ns
ns
mA
mA
V
%
%
http://onsemi.com
4
4페이지 CS2844, CS3844, CS2845, CS3845
ORDERING INFORMATION
Device
Temperature Range
CS2844LN8
CS2844LD14
CS2844LDR14
CS2844LDW16
CS2844LDWR16
–25°C to 85°C
CS2845LN8
CS2845LDW16
CS2845LDWR16
CS3844GN8
CS3844GD8
CS3844GDR8
CS3844GD14
CS3844GDR14
CS3844GDW16
CS3844GDWR16
CS3845GN8
0°C to 70°C
CS3845GD8
CS3845GDR8
CS3845GD14
CS3845GDR14
CS3845GDW16
CS3845GDWR16
Package
DIP–8
SO–14
SO–14
SO–16L
SO–16L
DIP–8
SO–16L
SO–16L
DIP–8
SO–8
SO–8
SO–14
SO–14
SO–16
SO–16
DIP–8
SO–8
SO–8
SO–14
SO–14
SO–16L
SO–16L
Shipping
50 Units/Rail
55 Units/Rail
2500 Tape & Reel
48 Units/Rail
2500 Tape & Reel
50 Units/Rail
48 Units/Rail
2500 Tape & Reel
50 Units/Rail
98 Units/Rail
2500 Tape & Reel
55 Units/Rail
2500 Tape & Reel
48 Units/Rail
2500 Tape & Reel
50 Units/Rail
98 Units/Rail
2500 Tape & Reel
55 Units/Rail
2500 Tape & Reel
48 Units/Rail
2500 Tape & Reel
http://onsemi.com
7
7페이지 | |||
구 성 | 총 12 페이지수 | ||
다운로드 | [ CS2845.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
CS2841B | Automotive Current Mode PWM Control Circuit | Cherry Semiconductor Corporation |
CS2841B | Automotive Current Mode PWM Control Circuit | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |