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參數資料
| 型號： | SC4810B |
| 廠商： | Semtech Corporation |
| 英文描述： | High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
| 中文描述： | 高性能電流模式PWM控制器，帶有互補輸出，可編程延遲 |
| 文件頁數： | 1/24頁 |
| 文件大小： | 374K |
| 代理商： | SC4810B |
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www.semtech.com
SC4810B/E
High Performance Current Mode PWM Controller
with Complementary Output, Programmable Delay
POWER MANAGEMENT
Description
Revision: July 27, 2006
Features
Applications
Typical Application Circuit
Operation to 1MHz
Accurate programmable maximum duty cycle
Line voltage monitoring
External frequency synchronization
Bi-phase mode of operation for low ripple
Independent programmable delays
Hiccup mode current limit
Under 250μA start-up current
Programmable maximum volt-second clamp
Accessible reference voltage
VDD undervoltage lockout
-40°C to 105°C operating temperature
16 lead TSSOP or MLPQ lead free packages. Both
fully WEEE and RoHS compliant
The SC4810B/E is a 16 pin BICMOS primary side PWM
controller for use in Isolated DC-DC and off-line switching
power supplies. It is a highly integrated solution, requiring
few external components. It features a high frequency
of operation, accurately programmable maximum duty
cycle, current mode control, line voltage monitoring, supply
UVLO, low start-up current, and programmable soft start
with user accessible reference. It operates in a fixed
frequency, highly desirable for Telecom applications. The
output for switch is complementary to each other with
programmable delay between each transition. The active
technique allows single ended converters beyond 50%
duty cycle and greater flux swing for the power
transformer while reducing voltage stresses on the
switches. The separate sync pin simplifies synchronization
to an external clock. Feeding the oscillator of one device
to the sync of another forces biphase operation which
reduces input ripple and filter size.
The SC4810B/E has a turn-on voltage threshold of 7V.
In the SC4810B, OUT2 is inverted to drive the N-MOSFET.
In the SC4810E, OUT2 is non-inverted to drive the
P-MOSFET. These devices are available in a TSSOP-16 or
MLPQ-16 lead package.
Telecom equipment and power supplies
Networking power supplies
Power over LAN applications
Industrial power supplies
Isolated power supplies
VoIP phones
Vout
R19
C3
C4
C5
+48V
R5
R2
U3
1
7
2
6
5
U4
SC431L
C10
D3
R17
L1
C13
D2
C16
R1
U1
SC1302A
6
1
2
7
3
8
4
5
C15
R10
R21
R18
R3
U2
SC4810
L
2
RCT
4
FB
11
SYNC
3
CS
10
P
1
OUT1
15
V
1
DMAX
5
SS
9
DELAY1
7
RAMP
6
VREF
16
OUT2
13
DELAY2
8
G
1
R20
Q4
T1
C12
R15
R16
C9
R12
R13
R6
C8
D4
D1
R8
C1
C11
R11
R23
R9
C14
C2
R14
R22
Q1
D5
T2
R4
C6
C7
R7
Q3
Q2
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| SC4810BIMLTRT | High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
| SC4810BITSTRT | High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
| SC4810E | High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
| SC4810EIMLTRT | High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4810BIMLTRT | 制造商:Semtech Corporation 功能描述:Controller IC Leaded Process Compatible: |
| SC4810BITSTRT | 制造商:Semtech Corporation 功能描述:Controller IC |
| SC4810E | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Current Mode PWM Controller with Complementary Output, Programmable Delay |
| SC4810EIMLTRT | 制造商:Semtech Corporation 功能描述:Controller IC Leaded Process Compatible: |
| SC4810EITSTRT | 制造商:Semtech Corporation 功能描述:Controller IC |
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