ALTAIR04-900TR Ver la hoja de datos (PDF) - STMicroelectronics
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ALTAIR04-900TR Datasheet PDF : 29 Pages
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ALTAIR04-900
Off-line all-primary-sensing switching regulator
Datasheet - production data
• Low standby consumption
• Overcurrent protection against transformer
saturation and secondary diode short-circuit
• SO16N package
SO16N
Features
• Optoless primary side constant voltage
operations
• Adjustable and mains-independent maximum
output current for safe operations during
overload/short-circuit conditions
• 900 V avalanche-rugged internal power section
• Quasi-resonant valley switching operation
Applications
• SMPS for energy metering
• Auxiliary power supplies for 3-phase input
industrial systems
• AC-DC adapters
Description
The ALTAIR04-900 is a high voltage all-primary-
sensing switcher, operating directly from the
rectified mains with minimum external parts. It
combines a high-performance low voltage PWM
controller chip and a 900 V avalanche-rugged
power section in the same package.
Figure 1. Block diagram
+Vi n
+V out
Vc c
Rz cd
ZCD/F B
Rfb
Is tart-up
P ROT ECTION &
FE EDFORWARD
LOGI C
Prot
DE MAG
LOGIC
S /H
-
+
2.5 V
IFF
3.3 V
R
S
Q
R
Int ernal s upply bus
V ref
SUPP LY
& UV LO
B LA NK ING
TIME
Vc
-
+
Iref
+
-
UV LO
STA RT ER
TURN -ON
LOGI C
LEB
S
Q
R
1V
-
I FF
+
R FF
Intern.
s upply
bus
S
Q
R
UV LO
Prot
DRA IN
C OMP
R comp
IR EF
Cref
Cc om p
GN D
S OURCE
Rsens e
October 2014
This is information on a product in full production.
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