This product is not recommended for new designs.
TOP232-234
TOPSwitch-FXFamily
Design Flexible, EcoSmart, Integrated
Off-Line Switcher
Product Highlights
+
AC
IN
DC
Lower System Cost, High Design Flexibility
OUT
-
• Features eliminate or reduce cost of external components
• Fully integrated soft-start for minimum stress/overshoot
• Externally settable accurate current limit
• Wider duty cycle for more power, smaller input capacitor
• Line under-voltage (UV) detection: no turn off glitches
• Line overvoltage (OV) shutdown extends line surge limit
D
S
M
CONTROL
C
• Line feed-forward with maximum duty cycle (DCMAX
reduction rejects ripple and limits DCMAX at high line
)
TOPSwitch-FX
F
• Single resistor sets OV/UV thresholds, DCMAX reduction
• Frequency jittering reduces EMI and EMI filtering costs
• Regulates to zero load without dummy loading
• 132 kHz frequency reduces transformer/power supply size
• Half frequency option for video applications
PI-2503-062515
Figure 1. Typical Flyback Application.
• Hysteretic thermal shutdown for automatic recovery
• Large thermal hysteresis prevents PC board overheating
• Standard packages with omitted pins for large creepage
• Active-on and active-off remote ON/OFF capability
• Synchronizable to a lower frequency
OUTPUT POWER TABLE
Product3
230 VAC 1ꢀ5
Open
8ꢀ-26ꢀ VAC
Open
Adapter1
Adapter1
Frame2
Frame2
EcoSmart™– Energy Efficient
• Cycle skipping reduces no-load consumption
• Reduced consumption in remote off mode
• Half frequency option for high efficiency standby
• Allows shutdown/wake-up via LAN/input port
TOP232P
TOP232G
TOP232Y
9 W
15 W
25 W
25 W
50 W
30 W
75 W
6.5 W
7 W
10 W
15 W
15 W
30 W
20 W
45 W
10 W
13 W
20 W
16 W
30 W
TOP233P
TOP233G
TOP233Y
TOP234P
TOP234G
TOP234Y
Description
9 W
TOPSwitch™-FX uses the proven TOPSwitch topology and
cost effectively integrates many new functions that reduce
system cost and, at the same time, improve design flexibility,
performance and energy efficiency. Like TOPSwitch, the
high-voltage power MOSFET, PWM control, fault protection
and other control circuitry are all integrated onto a single
CMOS chip, but with two added terminals. The first one is a
MULTI-FUNCTION (M) pin, which implements programmable
line OV/UV shutdown and line feed-forward/DCMAX reduction
with line voltage. The same pin can be used instead to
externally set an accurate current limit. In either case, this pin
can also be used for remote ON/OFF or to synchronize the
oscillator to an external, lower frequency signal. The second
added terminal is the FREQUENCY (F) pin and is available only
in the Y package. This pin provides the half frequency option
when connected to CONTROL (C) instead of SOURCE (S).
The features on the new pins can be disabled by shorting
them to the SOURCE, which allows the device to operate in a
three terminal TOPSwitch mode, but with the following new
transparent features: soft-start, cycle skipping, 132 kHz
15 W
11 W
20 W
Table 1.
Notes:
1. Typical continuous power in a non-ventilated enclosed adapter measured at
50 ˚C ambient.
2. Maximum practical continuous power in an open frame design with adequate
heat sinking, measured at 50 ˚C ambient. See key applications section for
detailed conditions.
3. Packages: P: DIP-8B, G: SMD-8B, Y: TO-220-7B.
hysteretic thermal shutdown and larger creepage. In addition,
all critical parameters such as frequency, current limit, PWM
gain, etc. have tighter temperature and absolute tolerances
compared to the TOPSwitch-II family. Higher current limit
accuracy and larger DCMAX, when combined with other
features allow for a 10% to 15% higher power capability on the
TOPSwitch-FX devices compared to equivalent TOPSwitch-II
devices for the same input/output conditions.
switching frequency, frequency jittering, wider DCMAX
,
www.power.com
June 2015
This Product is Covered by Patents and/or Pending Patent Applications.
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