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PDF PKS607F Data sheet ( Hoja de datos )
| Número de pieza | PKS607F | |
| Descripción | (PKS603 - PKS607) Off-Line Switcher IC | |
| Fabricantes | Power Integrations | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PKS607F (archivo pdf) en la parte inferior de esta página. Total 24 Páginas | ||
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PKS603-607
PeakSwitch™ Family
Enhanced, Energy-Efficient, Off-Line Switcher
IC With Super Peak Power Performance
Product Highlights
EcoSmart®– Extremely Energy-Efficient
• Standby output power ≥0.6 W for 1 W input (high line)
• Sleep mode power ≥2.4 W at 3 W input (high line)
• No-load consumption <200 mW at 265 VAC input
• Surpasses California Energy Commission (CEC),
ENERGY STAR, and EU requirements
PeakSwitch Features Reduce System Cost
• Delivers peak power of up to three times maximum
continuous output power
• 277 kHz operation during peak power significantly
reduces transformer size
• Programmable smart AC line sensing provides latching
shutdown during short circuit, overload and open loop
faults, and prevents glitches during power down or
brownout
• Two external components reset latch on AC removal
• Adaptive switching cycle on-time extension increases low
line peak output power, minimizing bulk capacitor size
• Adaptive current limit reduces output overload power
• Frequency jittering reduces EMI filter cost
• Tight I2f tolerances and negligible temperature variation
of key parameters ease design and lower cost
• Accurate hysteretic thermal shutdown with automatic
recovery provides complete system level overload
protection and eliminates need for manual reset
Better System Cost/Performance over RCC & Discrete
• Simple ON/OFF control – no loop compensation needed
• Very low component count – higher reliability and single
side printed circuit board
• High bandwidth provides fast turn on with no overshoot
and excellent transient load response
• Peak current limit operation rejects line frequency ripple
• Built-in current limit and hysteretic thermal protection
Applications
• Inkjet printer
• Data storage, audio amplifier, DC motor drives
Description
PeakSwitch is designed to address applications with high peak-
to-continuous power ratio demands. The very high switching
frequency during peak power loads and excellent load transient
response reduce system cost as well as component count and size.
PeakSwitch incorporates a 700 V power MOSFET, oscillator,
high voltage switched current source for startup, current limit,
AC +
IN DC
OUT
Optional Smart
AC Sense
D
PeakSwitch
S
EN/UV
BP
Figure 1. Typical Peak Power Application.
PI-3995-051006
OUTPUT POWER TABLE
230 VAC ±15%
85-265 VAC
PRODUCT3 Adapter Adapter Adapter Adapter
Cont.1 Peak2 Cont.1 Peak2
PKS603 P
13 W 32 W 9 W 25 W
PKS604 P
23 W 56 W 16 W 44 W
PKS604 Y/F 35 W 56 W 23 W 44 W
PKS605 P
31 W 60 W 21 W 44 W
PKS605 Y/F 46 W 79 W 30 W 58 W
PKS606 P
35 W 66 W 25 W 46 W
PKS606 Y/F 68 W 117 W 45 W 86 W
PKS607 Y/F 75 W 126 W 50 W 93 W
Table 1.
Notes:
1. Typical continuous power in a non-ventilated enclosed adapter
measured at +50 °C ambient.
2. Typical peak power for a period of 100 ms and a duty cycle of
10% in a non-ventilated enclosed adapter measured at +50 °C
(see Key Applications section for details).
3. See Part Ordering Information.
and thermal shutdown onto a monolithic device. In addition,
these devices incorporate auto-restart, line under-voltage sense
and frequency jittering. An innovative design minimizes audio
frequency components in the simple ON/OFF control scheme
to practically eliminate audible noise with standard varnished
transformer construction.
October 2006
Free Datasheet http://www.datasheet4u.com/
1 page  
300
200
100
0
10
5
0
VDRAIN
VDC-OUTPUT
05
Time (s)
Figure 6. PeakSwitch Auto-Restart Operation.
10
the line under-voltage sense circuit prevents a
restart attempt until the AC input voltage is removed
(IEN <25 µA). Then the internal auto-restart latch is reset and
the power MOSFET switching will resume once the AC input
voltage is applied again (IEN >25 µA). This effectively provides
a latching shutdown function with AC reset during such a fault
condition.
When a brownout or line sag occurs, output regulation may be
lost and the EN/UV pin will receive no feedback (it is pulled
low).After 30 ms of no feedback, MOSFETswitching is disabled.
Since the AC line is abnormally low (IEN <25 mA) MOSFET
switching remains disabled until normal line voltage is restored.
The power MOSFET switching will resume once the AC input
returns to normal (IEN >25 µA). This effectively disables the
latching shutdown function during such a condition.
Auto-Restart (UV resistor not present)
In the event of a fault condition such as output overload,
output short circuit or an open loop condition, PeakSwitch
enters into auto-restart operation. An internal counter
clocked by the oscillator is reset every time the EN/UV pin
is pulled low. When the EN/UV pin receives no feedback
for 30 ms, the power MOSFET switching is disabled for
5 seconds (150 ms for the first auto-restart event). The
auto-restart alternately enables and disables the switching
of the power MOSFET until the fault condition is removed.
Figure 6 illustrates auto-restart circuit operation in the presence
of an output short circuit.
Adaptive Switching Cycle On-time Extension
Adaptive switching cycle on-time extension keeps the MOSFET
on until current limit is reached, instead of terminating after
the DCMAX signal goes low. This on-time extension is adaptive
because it only occurs after the ENABLE pin has been high
for approximately 750 µs, a condition that would arise if the
PKS603-607
peak output power was required in low line conditions. On-time
extension is disabled during the startup of the power supply.
PeakSwitch Operation
PeakSwitch devices operate in the current-limit mode. When
enabled, the oscillator turns the power MOSFET on at the
beginning of each cycle. The MOSFET is turned off when the
current ramps up to the current limit or when the DCMAX limit
is reached. Since the highest current limit level and frequency
VEN
CLOCK
DMAX
IDRAIN
VDRAIN
PI-2749-050301
Figure 7. PeakSwitch Operation at Near Maximum Loading.
VEN
CLOCK
DMAX
IDRAIN
VDRAIN
PI-2667-090700
Figure 8. PeakSwitch Operation at Moderately Heavy Loading.
Rev. I 10/06
Free Datasheet http://www.datasheet4u.com/
5 Page 
PKS603-607
+
HV Input Filter Capacitor
-
TOP VIEW
D
S
S
PeakSwitch EN/UV
S
S BP
CBP
Safety Spacing
CapYa1c-itor
Maximize hatched copper
areas (
) for optimum
heatsinking
Output
Rectifier
Output Filter
Capacitor
PRI
BIAS
PRI
BIAS
T
r
a
n
s
f
o
r
m
e
r
SEC
Opto-
coupler
(a)
- DC +
OUT
PI-4326-060706
Safety Spacing
Maximize hatched copper
areas (
) for optimum
+
CapYa1c-itor
heatsinking
HV Input Filter Capacitor
-
TOP VIEW
Heat Sink
D
NC
EN/UV
GND
CBP
PRI
PRI
BIAS
BIAS
BP
T
r
a
n
s
f
o
r
m
e
r
Opto-
coupler
SEC
(b)
Figure 17. Recommended Layout for PeakSwitch in (a) P and (b) Y/F Packages.
Output
Rectifier
Output Filter
Capacitor
- DC +
OUT
PI-4327-031706
11
Rev. I 10/06
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet PKS607F.PDF ] | |
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