Datasheet

Application Note 3 2015-02-11
Revision 1.0
ISO2H823V2.5 Evaluation Board
Board Manual
Overview
1Overview
The ISO2H823V2.5 is a galvanically isolated 8-bit data interface in PG-VQFN70-2 package that provides 8 fully
protected high-side power switches that are able to handle currents up to 730 mA per channel.
An 8-bit parallel µController compatible interface or a serial SPI-interface allows to connect the IC directly to a
µController system. The input interface supports also a direct control mode for writing driver information and is
designed to operate with 3.3 V CMOS compatible levels.
This product is the second generation of isolated 8 channel digital output device (ISO2H823V2.5) and provides a
robust integrated diagnosis for switches with low R
DS(on)
as well as an upgraded µController interface.
Figure 1 Typical Application
The data transfer from input to output side is realized by the integrated Coreless Transformer Technology.
The IC contains 2 galvanic isolated voltage domains that are independent from each other. The input interface
(µC-chip) is supplied at V
CC
and the output stage (power chip) is supplied at V
BB
. The different voltage domains
can be switched on at different time. The output stage is only enabled once the input stage enters a stable state.
The power chip generates out of V
BB
two internal voltages V
DDIO
= 3.3 V (+ 10%) and V
CORE
= 1.5 V (+ 10%) which
have to be buffered externally.
The ISOFACE ISO2H823V2.5 includes 8 high-side power switches that are controlled by means of the integrated
parallel/serial interface. The interface is 8-bit µController compatible. Furthermore a direct control mode can be
selected that allows the direct control of the outputs OUT0 … OUT7 (power chip) by means of the inputs AD0 …
AD7 (µC-chip) without any additional logic signal. The IC can replace 8 optocouplers and the 8 high-side switches
in conventional I/O-Applications as a galvanic isolation is implemented by means of the integrated coreless
transformer technology. The µController compatible interface allows a direct connection to the ports of a
microcontroller without the need for other components. Each of the 8 high-side power switches is protected against
overload, overtemperature and against overvoltage by an active zener clamp.
µC
e.g.
XMC4xxx
VCC
ERR
CS
ODIS
GND
ISO2H823V2
parallel
AD0,
…,
AD7,
RD,
WR,
ALE
SYNC
OUT7
OUT0
VBB
LEDx0
LEDx1
LEDx2
LEDy0
LEDy1
LEDy2
VCORE
VDDIO
CLKADJ
only
in
serial
mode,
shared
pins
DRIVE Reg
Diagnostic _0
I
n
t
e
r
f
a
c
e
L
o
g
i
c
LED Matrix
OSC
PMU
3.3 V
1.5 V
Drive Control &
Diagnostics
Drive Control &
Diagnostics
OSC
RST
GNDBB
….
CT Transfer
CT Transfer
LED Matrix
Con-
figuration
Registers
Diagnostic _1
Diagnostic _7
Error -
Registers
….
serial
SDI,
SDO,
SCLK,
/CRCERR
or
SEL
RESYNCH
.
.
.
.
.
.
.
.
.
.
.
.
IADJ
OLADJ
OUTx
uC_chip power chip