Primary Side PWM Controller
Features
Description
The AS2214 is a full featured, pulse width modulation
controller. Based on an improved AS3842, the AS2214
provides additional features that reduce component count
and improve specifications in a wide range of power supply
designs. The added functionality includes AC power and
bulk voltage sensing, over-voltage input, as well as the ability
to latch off or bounce through different fault conditions.
The PWM function is controlled by the current sense com-
parator for normal current mode control and a second
comparator for voltage mode soft start. A buffered RAMP
signal is available for slope compensation without loading
the oscillator. The output stage is a high current totem pole
output that sees only 85 ns delay from the PWM comparator.
The AS2214 requires less than 10碌A(chǔ) of startup current. The
undervoltage lockout (UVLO) thresholds are nominally 13.8V
for turn on and 8 V for turn off. A precision 2.5 V bandgap
reference serves as an input for the error amplifier. The
oscillator discharge current is trimmed to provide guaran-
teed duty cycle clamping.
AS2214
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Low Startup Current
Bulk and AC sensing
Soft Start
Single-start or auto-restart
modes
Oscillator trimmed for precision
duty cycle clamp
Standard temperature range
extended to 105擄C
Remote on / off control
Buffered Ramp for slope
compensation
Standard current mode control
Pin Configuration
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Top view
V
CC
V
REG
COMP
V
FB
ISNS
SS
RAMP
1
2
3
4
5
6
7
14 OUT
13 GND
12 BOK
11 LEN
10 ACP
9
8
OV
RT/CT
Ordering Information
Package
Temperature Range
Order Code
14-Pin Plastic DIP
0 to 105擄 C
AS2214N
ASTEC Semiconductor
83
AS2214N相關(guān)型號(hào)PDF文件下載
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英文版
Primary Side PWM Controller
ETC
-
英文版
Primary Side PWM Controller
ETC [ETC]
-
英文版
Primary Side PWM Controller
ETC [ETC]
-
英文版
Primary Side PWM Controller
ETC
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英文版
Primary Side PWM Controller
ETC [ETC]
-
英文版
Primary Side PWM Controller
ETC
-
英文版
Primary Side PWM Controller
ETC [ETC]
-
英文版
Primary Side PWM Controller
ETC
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英文版
Primary Side PWM Controller
ETC [ETC]
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英文版
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