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LTC4236-2

更新时间： 2024-02-18 23:12:42
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
8页 266K
描述
Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor

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LTC4236-2 数据手册

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DEMO MANUAL DC2314A  
LTC4236-1/LTC4236-2  
Dual Ideal Diode-OR and Single Hot  
Swap Controller with Current Monitor  
DESCRIPTION  
Demonstration circuit 2314A is intended to demonstrate  
the performance of the LTC4236-1/LTC4236-2 Dual Ideal  
Diode-OR and Single Hot Swap Controller with Current  
Monitor. The controller operates in redundant supply  
circuits, where each rail has an individual ideal diode, and  
the outputs are connected to the load through a single  
Hot Swap circuit. The controller enables monitoring of  
the load current by providing a signal that is 100× the  
sense resistor voltage.  
The main board components are the LTC4236 controller,  
two power MOSFETs functioning as ideal diodes and one  
powerMOSFETcontrolledasaHotSwapswitch,twojump-  
ers for enabling the second ideal diode and Hot Swap, four  
LEDstoindicatethepowergoodstate, faultcondition, and  
the state of the MOSFETs operating as ideal diodes, seven  
banana jacks for connecting power supplies and loads,  
and many turrets and pads for observing circuit signals.  
Table 1. DC2314A Assembly Options  
TheDC2314AallowsverificationoftheLTC4236HotSwap  
andidealdiodefunctionalityduringindividualrailramp-up  
and ramp-down events, during power supply switchover,  
in steady state, and in overcurrent fault conditions.  
Version  
Part  
Overcurrent Fault  
LATCHOFF  
DC2314A-A  
DC2314A-B  
LTC4236-1  
LTC4236-2  
RETRY  
Design files for this circuit board are available at  
http://www.linear.com/demo/DC2314A  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
The DC2314A is configured for 12V operation with a 10A  
current load.  
BOARD AND CONTROLLER PERFORMANCE SUMMARYSpecifications are at TA = 25°C  
SYMBOL  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Supplies  
V
Input Supply Range  
2.9  
8.91  
4.5  
18.0  
11.11  
5.5  
V
A
V
V
IN  
I
Board Current Limit  
OUT = 11V  
10  
5
LIM  
V
V
Internal Regulator Voltage  
INTVCC  
Internal V Undervoltage Lockout  
INTV Rising  
2.1  
2.2  
2.3  
INTVCC(UVL)  
CC  
CC  
Ideal Diode Control  
ΔV  
ΔV  
Forward Regulation Voltage (V – V )  
SENSE  
2
15  
28  
mV  
FWD(REG)  
DGATE  
INN  
External N-Channel Gate Drive  
IN < 7V, ΔV  
= 0.15V; I = 0, –1µA  
5
10  
7
12  
14  
14  
V
V
FWD  
(V  
DGATE1  
– V ) and (V  
– V  
)
IN = 7V to 18V, ΔV = 0.15V; I = 0, –1μA  
FWD  
IN1  
DGATE2  
D2SRC  
I
CPO Pull-Up Current  
CPO = IN = D2SRC = 2.9V  
CPO = IN = D2SRC = 18V  
–60  
–50  
–100  
–90  
–130  
–120  
µA  
µA  
CPO(UP)  
n
I
I
I
t
t
t
DGATE Fast Pull-Up Current  
ΔV  
ΔV  
= 0.2V, ΔV = 0V, CPO = 17V  
DGATE  
–1.5  
1.5  
A
A
DGATE(FPU)  
DGATE(FPD)  
DGATE2(DN)  
ON(DGATE)  
OFF(DGATE)  
PLH(DGATE2)  
n
FWD  
FWD  
DGATE Fast Pull-Down Current  
= –0.2V, ΔV  
= 5V  
n
DGATE  
DGATE2 Off Pull-Down Current  
D2OFF = 2V, ΔV  
= 2.5V  
= 10nF  
50  
100  
0.25  
0.2  
200  
0.5  
0.5  
µA  
µs  
µs  
µs  
DGATE2  
DGATE Turn-On Delay  
ΔV  
FWD  
ΔV  
FWD  
= 0.2V, C  
DGATE  
n
DGATE Turn-Off Delay  
= –0.2V, C  
= 10nF  
n
DGATE  
D2OFF Low to DGATE2 High  
50  
100  
dc2314af  
1
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