BL4S200 User’s Manual
181
B.3 Power to Peripheral Cards
DCIN and Vcc are available on Micro-Fit
®
connector J7 to power RabbitNet peripheral
boards that may be used with the BL4S200.
Keep in mind that the BL4S200 draws 377 mA from the Vcc supply, and that the diode at
D10 (shown in Figure B-1) can handle at most 2 A at V
RAW
, so that leaves the remaining
current capacity to be shared among the DCIN and Vcc pins on Micro-Fit
®
connector J7.
Table B-1 lists the available current at DCIN based on the current drawn at Vcc.
For example, if the raw power supply input is 12 V, and the Vcc supply at J7 draws 200 mA,
641 mA will be available for DCIN.
Table B-1. DCIN Current Available at J7 (in mA)
Based on Power Supply and Vcc (= 5 V) Current Used at J7
V
RAW
Power Supply
Input at J2
(V)
Current at J7 with Vcc = 5 V
100 mA 200 mA 300 mA 400 mA 500 mA 600 mA 623 mA
8.0
545
450
355
260
164
69
47
8.5
574
484
395
306
216
127
107
9.0
599
515
431
347
263
178
159
10
641
566
490
415
340
265
248
12
703
641
579
517
455
393
378
18
805
764
723
682
642
601
591
24
855
824
794
763
733
703
696
30
884
860
836
811
787
763
750
40
913
895
877
859
841
823
819
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