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參數(shù)資料
| 型號(hào)： | SC4910A |
| 廠商： | Semtech Corporation |
| 英文描述： | High Performance Secondary Side Controller with Synchronous Rectifier |
| 中文描述： | 高性能二次側(cè)同步整流控制器 |
| 文件頁(yè)數(shù)： | 12/19頁(yè) |
| 文件大?。?/td> | 330K |
| 代理商： | SC4910A |
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12
2005 Semtech Corp.
www.semtech.com
SC4910A/B
POWER MANAGEMENT
Applications Information (Cont.)
Load Remote Sensing
Dedicated -SENSE pin provides true remote sensing of
the regulated supply’s output terminal voltage for high
current applications. As shown in Figure 5, the bandgap
reference “ground “ is brought out as –Sense, which is
connected to the “l(fā)oad ground” and to the local analog
ground by the resistor R10. With this way combined with
upper side R1, the voltage drop on power line is offset
and the load voltage is truly sensed.
R7
R8
LOAD
R10
C5
SC4910
18
17
11
16
6
4
10
7
20
19
3
1
15
2
5
1
8
9
1
1
FB
COMP
OUTB
ISHARE
PHASE
CS
OUTA
A
RT1
RT2
SS
-SENSE
DELAY
SYNC/EN
VREF
P
P
P
P
A
C6
R1
R6
Figure 5
Load Current Sharing
A single wire connected between the ISHARE pins will
force current sharing between parallel units for paralleling
or n+1 redundant operation.
The ISHARE pin allows for current sharing between several
parallel units. The ISHARE pin connects internally to the
non-inverting input of ISHARE amplifier. An internal 4K
resistor is between the inverting and non-inverting inputs
of this amplifier, with the inverting input also connected
to the COMP pin. The output of the amplifier connects
to the SS (0.75V ref) pin. During normal operation, when
all devices are sharing the load current equally, the COMP
pin voltages on each units should be approximately equal.
If one of the devices begins to take on too much or too
little of the load, the difference in COMP pin voltage will
cause the ISHARE amplifier to adjust the SS (0.75V ref)
voltage accordingly. In the event of ISHARE pulled down
below 1V, the ISHARE amplifier is disabled to prevent
output voltage of the unit lower than specification.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC4910AITSTRT | High Performance Secondary Side Controller with Synchronous Rectifier |
| SC4910B | High Performance Secondary Side Controller with Synchronous Rectifier |
| SC4910BITSTRT | High Performance Secondary Side Controller with Synchronous Rectifier |
| SC4911 | Bias/Primary Side PWM Controller with Ultra Low Start-up Current |
| SC4911IMSTR | Bias/Primary Side PWM Controller with Ultra Low Start-up Current |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC4910AITSTR | 制造商:Semtech Corporation 功能描述:IC, PWM CONTROLLER, 12V, 20-TSSOP, Output Voltage:10V, Output Current:100mA, Sup |
| SC4910AITSTRT | 制造商:Semtech Corporation 功能描述:SC Series 18 V SMT High Performance Secondary Side Controller - TSSOP-20 |
| SC4910B | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:High Performance Secondary Side Controller with Synchronous Rectifier |
| SC4910BITSTRT | 制造商:Semtech Corporation 功能描述:Secondary Side PWM Cntrlr SYNC POST REGUL 450KHz to 550KHz 20-Pin TSSOP T/R 制造商:Semtech Corporation 功能描述:ADV SCND SIDE CNTRL W/SYNCH RE |
| SC4911 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Bias/Primary Side PWM Controller with Ultra Low Start-up Current |
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