Si88x4x
QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER
Features
High-speed isolators with
integrated dc-dc converter
Fully-integrated secondary sensing
Highly-reliable: 100 year lifetime
High electromagnetic immunity and
ultra-low emissions
feedback-controlled converter with RoHS compliant packages
dithering for low EMI
SOIC-20 wide body
SOIC-24 wide body
Isolation of up to 5000 Vrms
High transient immunity of
100 kV/µs (typical)
dc-dc converter peak efficiency of
83% with external power switch
Up to 5 W isolated power with
external power switch
Ordering Information:
Options include dc-dc shutdown,
frequency control, and soft start
Standard Voltage Conversion
3/5 V to isolated 3/5 V
24 V to isolated 3/5 V supported
Precise timing on digital isolators
0–100 Mbps
AEC-Q100 qualified
Wide temp range
–40 to +125 °C
See page 38.
Pin Assignments
See page 33
18 ns typical prop delay
1
2
3
4
5
6
20
19
GNDP
VSW
VDDP
VDDA
GNDA
SH
GNDB
VDDB
Applications
18 DNC
17 NC
Industrial automation systems
Hybrid electric and electric
vehicles
Inverters
Data acquisition
Motor control
PLCs, distributed control systems
VSNS
16
15 COMP
B1
Isolated power supplies
HF
XMTR
HF
RCVR
A1
14
13 B2
7
8
HF
XMTR
HF
RCVR
A2
Safety Approval (Pending)
HF
XMTR
HF
RCVR
A3
B3
B4
9
12
11
UL 1577 recognized
VDE certification conformity
VDE 0884-10
CQC certification approval
GB4943.1
HF
XMTR
HF
RCVR
A4
10
Up to 5000 Vrms for 1 minute
CSA component notice 5A
approval
Si88240
Patents pending
Description
The Si88xx integrates Silicon Labs’ proven digital isolator technology with an
on-chip isolated dc-dc converter that provides regulated output voltages of
3.3 or 5.0 V (or >5 V with external components) at peak output power levels
of up to 5 W. These devices provide up to four digital channels. The dc-dc
converter has user-adjustable frequency for minimizing emissions, a soft-start
function for safety, a shut-down option and loop compensation. The device
requires only minimal passive components and a miniature transformer.
The ultra-low-power digital isolation channels offer substantial data rate,
propagation delay, size and reliability advantages over legacy isolation
technologies. Data rates up to 100 Mbps max are supported, and all devices
achieve propagation delays of only 23 ns max. Ordering options include a
choice of dc-dc converter features, isolation channel configurations and a fail-
safe mode. All products are certified by UL, CSA, VDE, and CQC.
Preliminary Rev. 0.6 7/15
Copyright © 2015 by Silicon Laboratories
Si88x4x
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.