LNK603-606/613-616
LinkSwitch-II Family
Energy-Efficient, Accurate CV/CC Switcher
for Adapters and Chargers
Product Highlights
Dramatically Simplifies CV/CC Converters
Eliminates optocoupler and all secondary CV/CC control circuitry
Eliminates all control loop compensation circuitry
Advanced Performance Features
Wide Range
Compensates for transformer inductance tolerances
High-Voltage
DC Input
Compensates for input line voltage variations
D
FB
Compensates for cable voltage drop (LNK61X series)
LinkSwitch-II
BP/M
Compensates for external component temperature variations
Very tight IC parameter tolerances using proprietary trimming
S
technology
Frequency jittering greatly reduces EMI filter cost
Even tighter output tolerances achievable with external resistor
PI-4960-012315
selection/trimming
(a) Typical Application Schematic
Programmable switching frequency up to 85 kHz to reduce trans-
former size 5%
V
O
Advanced Protection/Safety Features
Auto-restart protection reduces power delivered by >95% for output
short-circuit and control loop faults (open and shorted components)
Hysteretic thermal shutdown automatic recovery reduces power
10%
supply returns from the field
Meets high-voltage creepage requirements between DRAIN and all
other pins both on the PCB and at the package
EcoSmart Energy Efficient PI-4906-012315
I
O
Easily meets all global energy efficiency regulations
(b) Output Characteristic
No-load consumption below 30 mW at 230 VAC with optional
Figure 1. Typical Application/Performance Not a Simplified Circuit (a) and
external bias winding
Output Characteristic Envelope (b). (see Application Section for
ON/OFF control provides constant efficiency down to very light loads
more information).
ideal for CEC and ENERGY STAR 2.0 regulations
No current sense resistors maximizes efficiency
Output Power Table
Green Package
85-265 VAC
3
Halogen free and RoHS compliant package
Product
1 2
Adapter Open Frame
Applications
LNK603/613PG/DG 2.5 W 3.3 W
Chargers for cell/cordless phones, PDAs, MP3/portable audio
LNK604/614PG/DG 3.5 W 4.1 W
devices, adapters, LED drivers, etc.
LNK605/615PG/DG 4.5 W 5.1 W
Description
LNK606/616PG/GG/DG 5.5 W 6.1 W
The LinkSwitch-II dramatically simplifies low power CV/CC charger
designs by eliminating an optocoupler and secondary control circuitry.
Table 1. Output Power Table.
The device introduces a revolutionary control technique to provide very
Notes:
tight output voltage and current regulation, compensating for transformer
1. Minimum continuous power in a typical non-ventilated enclosed adapter
and internal parameter tolerances along with input voltage variations. measured at +50 C ambient, device, T <100 C.
J
2. Maximum practical continuous power in an open frame design with adequate
The device incorporates a 700 V power MOSFET, a novel ON/OFF control
heat sinking, measured at 50 C ambient (see Key Applications Consider-
ations section for more information).
state machine, a high-voltage switched current source for self biasing,
3. Packages: P: DIP-8C, G: SMD-8C, D: SO-8C.
frequency jittering, cycle-by-cycle current limit and hysteretic thermal
shutdown circuitry onto a monolithic IC.
DIP-8C (P Package) SMD-8C (G Package) SO-8C (D Package).
Figure 2. Package Options.
www.power.com August 2016
This Product is Covered by Patents and/or Pending Patent Applications.LNK603-606/613-616
DRAIN
(D)
REGULATOR
BYPASS
6 V
(BP/M)
+
6 V
FB
-
+ 5 V
OUT Reset
STATE
D Q
FEEDBACK
V
TH -
MACHINE
(FB) V
ILIMIT
t
SAMPLE-OUT
I
Drive
LIM
V
DC
ILIMIT
CABLE DROP MAX
COMPENSATION
FAULT
FB
6.5 V Auto-Restart
Open-Loop
THERMAL
INDUCTANCE
SHUTDOWN
CORRECTION
DC
t MAX
SAMPLE-INPUT
t SAMPLE
SAMPLE-OUT
DELAY
t
SAMPLE-INPUT
OSCILLATOR
SOURCE
(S)
I
SOURCE LIM V
ILIMIT
CONSTANT
(S)
CURRENT
Current Limit
Comparator LEADING
EDGE
BLANKING
PI-4908-012915
Figure 3. Functional Block Diagram.
Pin Functional Description
DRAIN (D) Pin:
P Package (DIP-8C)
This pin is the power MOSFET drain connection. It provides internal
G Package (SMD-8C)
D Package (SO-8C)
operating current for both start-up and steady-state operation.
BYPASS/MULTI-FUNCTIONAL PROGRAMMABLE (BP/M) Pin:
This pin has multiple functions: 8
FB 1
1 8 S
FB S
1. It is the connection point for an external bypass capacitor for the
2 7
BP/M 2 7
S
internally generated 6 V supply. BP/M S
2. It is a mode selection for the cable drop compensation for
6
6 S S
LNK61X series.
4 5
D S
D 4 5
S
FEEDBACK (FB) Pin:
During normal operation, switching of the power MOSFET is controlled
by this pin. This pin senses the AC voltage on the bias winding. This
control input regulates both the output voltage in CV mode and output
current in CC mode based on the flyback voltage of the bias winding. PI-3491-020615
The internal inductance correction circuit uses the forward voltage on
Figure 4. Pin Configuration.
the bias winding to sense the bulk capacitor voltage.
SOURCE (S) Pin:
This pin is internally connected to the output MOSFET source for
high-voltage power and control circuit common returns.
2
Rev. J 08/16
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