STMicroelectronics Double output SMPS for power line application using ALTAIR04-900 primary controller EVLALTAIR900-M1 EVLALTAIR900-M1 Data Sheet
Product codes
EVLALTAIR900-M1
January 2011
Doc ID 18211 Rev 2
1/29
29
ALTAIR04-900
Off-line all-primary-sensing switching regulator
Features
■
Primary side constant voltage operations with
no optocoupler
no optocoupler
■
Adjustable and main-independent maximum
output current for safe operations during
overload/short circuit conditions
output current for safe operations during
overload/short circuit conditions
■
900 V avalanche rugged internal power section
■
Quasi-resonant valley switching operation
■
Low standby consumption
■
Overcurrent protection against transformer
saturation and secondary diode short circuit
saturation and secondary diode short circuit
■
SO16 package
Applications
■
SMPS for energy metering
■
Auxiliary power supplies for 3-phases input
industrial systems
industrial systems
■
AC-DC adapters
Description
ALTAIR04-900 is a high-voltage all-primary-
sensing switcher intended for 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.
sensing switcher intended for 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.
SO16N
Figure 1.
Block diagram
3.3 V
ZCD/F B
I FF
STA RT ER
S OURCE
TURN -ON
LOGI C
+Vi
n
+V out
Istart-up
Int ernal s upply bus
V ref
Intern.
s upply
bus
DRA IN
B LA NK ING
TIME
LE B
Vc c
Iref
2.5 V
R
S
Q
COMP
-
+
-
+
+
-
S /H
DE MAG
LOGIC
GND
S
R
Q
IREF
R
P ROT ECTION &
FE EDFORWARD
LOGI C
Prot
IFF
Vc
-
+
1 V
S
R
Q
UV LO
UV LO
Prot
RFF
SUPP LY
& UV LO
& UV LO
Rfb
Rz cd
Rsens e
Rcomp
Cc om p
Cref
3.3 V
ZCD/F B
I FF
STA RT ER
STA RT ER
S OURCE
TURN -ON
LOGI C
+Vi
n
+V out
Istart-up
Int ernal s upply bus
V ref
Intern.
s upply
bus
DRA IN
B LA NK ING
TIME
B LA NK ING
TIME
LE B
LE B
Vc c
Iref
2.5 V
R
S
Q
COMP
-
+
-
+
-
+
+
-
+
-
S /H
S /H
DE MAG
LOGIC
DE MAG
LOGIC
GND
S
R
Q
S
R
Q
IREF
R
P ROT ECTION &
FE EDFORWARD
LOGI C
P ROT ECTION &
FE EDFORWARD
LOGI C
Prot
IFF
Vc
-
+
-
+
1 V
S
R
Q
S
R
Q
UV LO
UV LO
Prot
RFF
SUPP LY
& UV LO
& UV LO
Rfb
Rz cd
Rsens e
Rcomp
Cc om p
Cref