ADUM4190_16 Datasheet, PDF (1/21 Pages) Analog Devices – High Stability Isolated Error Amplifier

Data Sheet
High Stability Isolated Error Amplifier
ADuM4190
FEATURES
Stable over time and temperature
0.5% initial accuracy
1% accuracy over the full temperature range
Compatible with Type II or Type III compensation networks
Reference voltage: 1.225 V
Compatible with DOSA
Low power operation: <7 mA total
Wide voltage supply range
VDD1: 3 V to 20 V
VDD2: 3 V to 20 V
Bandwidth: 400 kHz
Isolation voltage: 5 kV rms reinforced
Safety and regulatory approvals (pending)
UL recognition: 5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 849 V peak
Wide temperature range
−40°C to +125°C ambient operation
150°C maximum junction temperature
APPLICATIONS
Linear feedback power supplies
Inverters
Uninterruptible power supplies (UPS)
DOSA-compatible modules
Voltage monitors
GENERAL DESCRIPTION
The ADuM4190¹ is an isolated error amplifier based on Analog
Devices, Inc., iCoupler® technology. The ADuM4190 is ideal for
linear feedback power supplies. The primary side controllers of
the ADuM4190 enable improvements in transient response, power
density, and stability as compared to commonly used optocoupler
and shunt regulator solutions.
Unlike optocoupler-based solutions, which have an uncertain
current transfer ratio over lifetime and at high temperatures, the
ADuM4190 transfer function does not change over its lifetime
and is stable over a wide temperature range of −40°C to +125°C.
Included in the ADuM4190 is a wideband operational amplifier
for a variety of commonly used power supply loop compensation
techniques. The ADuM4190 is fast enough to allow a feedback loop
to react to fast transient conditions and overcurrent conditions.
Also included is a high accuracy 1.225 V reference to compare
with the supply output setpoint.
The ADuM4190 is packaged in a wide body, 16-lead SOIC package
for a reinforced 5 kV rms isolation voltage rating.
FUNCTIONAL BLOCK DIAGRAM
V_DD1 1
GND₁ 2
V_REG1 3
REF_OUT1 4
NC 5
EA_OUT2 6
EA_OUT 7
GND₁ 8
REG UVLO
REF
Rx
UVLO REG
REF
Tx
ADuM4190
Figure 1.
16 V_DD2
15 GND₂
14 V_REG2
13 REF_OUT
12 +IN
11 –IN
10 COMP
9 GND₂
1 _{Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.}
Rev. 0
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