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參數(shù)資料
| 型號： | E910.22 |
| 廠商： | ELMOS SEMICONDUCTOR AG |
| 英文描述： | Wide range SMPS with watchdog |
| 中文描述： | 與開關(guān)電源監(jiān)視范圍廣 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 90K |
| 代理商： | E910.22 |
BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
24
BLOCK DIAGRAM
Wide range SMPS with watchdog
Wide range SMPS with reset
PFM controller family
Step down converter, fully integrated
Step down converter, for external FET
PWM controller for LED
FEATURES
Flyback converter with wide input range of
3
V to
55
V
5
V first output voltage
Additional output voltages possible with additional
windings on transformer
Softstart capability
ON control-input with wide input voltage range
Precise, programmable windowed watchdog
Low standby current (
50
μA typical)
Open load stable
Snapback output current after short circuit on load
K
15
D control-input
Self-oscillating, multi-loop-regulation
Non dissipating primary current simulation
Degausing input and variable delayed switch on
Push/pull driver for logic level Power-MOSFET
No current shunt needed
–
40
°C to +
125
oC operating temperature
Additional system-enable output for critical
modules
SO
20
w package
APPLICATION
Automotive electronics
Controller and sensor supply
DESCRIPTION
The IC is developed and optimized for automotive applications
where it can generate different output voltages as a flyback con-
verter. The input voltage may be higher or lower than the output
voltage. The multi-loop-regulation concept ensures fast response
to variation of input voltage and load. The reset circuit generates
a reliable reset signal until the output is in tolerance and the inte-
grated, programmable windowed watchdog guarantees a mini-
mum and maximum software reset time. An additional system-
enable output enables critical components after the controller
has served the watchdog three times to guarantee a save control-
ler wake up sequence. This successful wake up also enables the
‘HOLD’-capability so that the controller can keep the converter
running without ‘ON’ and ‘K
15
D’ active.
Wide range SMPS with watchdog
VBAT
SMPS
Circuit
control
watchdog
internal
Supply
FET
DRV
RRDC
RDC
VDRV
DRV
PGND
DEG
RES
VAUX
VOUT
CMP
K15D
K15
HOLD
ON
SYS_EN
RESET
DWD
TCL
RWD
VSM
VS
AGND
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