SI8285 Datasheet, PDF (8/32 Pages) Silicon Laboratories – System Safety Features

3. Applications Information
The following sections detail the input and output circuits necessary for proper operation.
3.1 Recommended Application Circuits
Si8285/86 Data Sheet
Applications Information
MCU
+3.3V 0.1uF
100pF
U1
1
GNDA
2
VDDA
3
NC
4
/RST
5
/FLT
6
RDY
7
IN+
8
IN-
Si8285
16
NC
15
DSAT
0.1uF
15V
14
VDDB
13
RH
VH
12
RL
VL
11
CLMP
10
VMID
VSSB ^{9 10uF 0.1uF}
9V
Place RDSAT, CBL, and DDSAT
as close to Q1 as possible
RDSAT
DDSAT
+ RAIL
Q1
CBL
Q2
- RAIL
Figure 3.1. Recommended Si8285 Application Circuit
MCU
+3.3V
0.1uF
100pF
1
IN+
2
IN-
3
VDDA
4
GNDA
5
/RST
6
/FLT
7
NC
8
NC
Si8286
0.1uF
VMID
NC
DSAT
VDDB
VDDB
VO
VSSB
VSSB
16
15
14
13
12
11
10
10uF 0.1uF
9
15V
Rg
9V
Place RDSAT, DDSAT, CBL as
close to Q1 as possible
RDSAT
DDSAT
Q1
CBL
Q2
Figure 3.2. Recommended Si8286 Application Circuit
+ RAIL
- RAIL
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