Document
PKS603-607
PeakSwitch™ Family
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
®
Enhanced, Energy-Efficient, Off-Line Switcher IC With Super Peak Power Performance
AC IN
+
DC OUT
Optional Smart AC Sense PeakSwitch
D
EN/UV BP
S
PI-3995-051006
Figure 1. Typical Peak Power Application.
PRODUCT3 PKS603 P PKS604 P PKS604 Y/F PKS605 P PKS605 Y/F PKS606 P PKS606 Y/F PKS607 Y/F
Table 1.
OUTPUT POWER TABLE 85-265 VAC 230 VAC ±15% Adapter Adapter Adapter Adapter Cont.1 Peak2 Cont.1 Peak2 13 W 23 W 35 W 31 W 46 W 35 W 68 W 75 W 32 W 56 W 56 W 60 W 79 W 66 W 117 W 126 W 9W 16 W 23 W 21 W 30 W 25 W 45 W 50 W 25 W 44 W 44 W 44 W 58 W 46 W 86 W 93 W
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.
Description
PeakSwitch is designed to address applications with high peakto-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,
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/
PKS603-607
BYPASS (BP)
REGULATOR 5.8 V LINE UNDER-VOLTAGE
DRAIN (D)
240 µA
25 µA LATCH OFF/ AUTORESTART COUNTER ON TIME EXT RESET
FAULT PRESENT
+
BYPASS PIN UNDER-VOLTAGE
6.3 V
CURRENT LIMIT STATE MACHINE/ ADAPTIVE CURRENT LIMIT
-
5.8 V 4.8 V
VI
LIMIT
CURRENT LIMIT COMPARATOR
+
ENABLE
JITTER CLOCK 1.0 V + VT DCMAX OSCILLATOR ENABLE/ UNDERVOLTAGE (EN/UV) 1.0 V
S Q
THERMAL SHUTDOWN
R
Q
LEADING EDGE BLANKING
SOURCE (S)
GROUND (GND) (Y & F Package Only)
PI-3940-040606
Figure 2. Functional Block Diagram.
Pin Functional Description
Y Package (TO-220-7C)
Tab Internally Connected to SOURCE Pin 7D 5 NC 4S 3 EN/UV 2 GND 1 BP
DRAIN (D) Pin: The power MOSFET drain connection provides internal operating current for both startup and steady-state operation. BYPASS (BP) Pin: A 0.33 µF external bypass capacitor for the internally generated 5.8 V supply is connected to this pin. In typical applications, this pin must be externally supplied via a bias winding. ENABLE/UNDER-VOLTAGE (EN/UV) Pin: This pin has dual functions: enable input and line under-voltage sense. During normal operation, switching of the power MOSFET is controlled by this pin. MOSFET switching is disabled when a current greater than 240 µA is drawn from this pin. This pin may also sense line under-voltage conditions through either an external resistor connected to the DC line voltage or an AC sense circuit. SOURCE (S) Pin: This is the MOSFET source connection for high voltage return and control circuit common.
P Package (DIP-8C)
BP EN/UV 1 2 8 7 6 D 4 5 S S S S
F Package (TO-262-7C)
7D 5 NC 4S 3 EN/UV 2 GND 1 BP
PI-.