LNK616 CV/CC Switcher Datasheet

LNK616 Datasheet, PDF, Equivalent


Part Number

LNK616

Description

Accurate CV/CC Switcher

Manufacture

Power Integrations

Total Page 18 Pages
Datasheet
Download LNK616 Datasheet


LNK616
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
Compensates for transformer inductance tolerances
Compensates for input line voltage variations
Compensates for cable voltage drop (LNK61X series)
Compensates for external component temperature variations
Very tight IC parameter tolerances using proprietary trimming
technology
Frequency jittering greatly reduces EMI filter cost
Even tighter output tolerances achievable with external resistor
selection/trimming
Programmable switching frequency up to 85 kHz to reduce trans-
former size
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
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
Easily meets all global energy efficiency regulations
No-load consumption below 30 mW at 230 VAC with optional
external bias winding
ON/OFF control provides constant efficiency down to very light loads
– ideal for CEC and ENERGY STAR 2.0 regulations
No current sense resistors – maximizes efficiency
Green Package
Halogen free and RoHS compliant package
Applications
Chargers for cell/cordless phones, PDAs, MP3/portable audio
devices, adapters, LED drivers, etc.
Description
The LinkSwitch™-II dramatically simplifies low power CV/CC charger
designs by eliminating an optocoupler and secondary control circuitry.
The device introduces a revolutionary control technique to provide very
tight output voltage and current regulation, compensating for transformer
and internal parameter tolerances along with input voltage variations.
The device incorporates a 700 V power MOSFET, a novel ON/OFF control
state machine, a high-voltage switched current source for self biasing,
frequency jittering, cycle-by-cycle current limit and hysteretic thermal
shutdown circuitry onto a monolithic IC.
Wide Range
High-Voltage
DC Input
D
LinkSwitch-II
FB
BP/M
S
PI-4960-012315
(a) Typical Application Schematic
VO ±5%
±10%
PI-4906-012315
(b) Output Characteristic
IO
Figure 1. Typical Application/Performance – Not a Simplified Circuit (a) and
Output Characteristic Envelope (b). (see Application Section for
more information).
Output Power Table
Product3
LNK603/613PG/DG
LNK604/614PG/DG
LNK605/615PG/DG
LNK606/616PG/GG/DG
85-265 VAC
Adapter1
Open Frame2
2.5 W
3.3 W
3.5 W
4.1 W
4.5 W
5.1 W
5.5 W
6.1 W
Table 1. Output Power Table.
Notes:
1. Minimum continuous power in a typical non-ventilated enclosed adapter
measured at +50 °C ambient, device, TJ <100 °C.
2. Maximum practical continuous power in an open frame design with adequate
heat sinking, measured at 50 °C ambient (see Key Applications Consider-
ations section for more information).
3. Packages: P: DIP-8C, G: SMD-8C, D: SO-8C.
www.power.com
DIP-8C (P Package) SMD-8C (G Package)
Figure 2. Package Options.
This Product is Covered by Patents and/or Pending Patent Applications.
SO-8C (D Package).
August 2016

LNK616
LNK603-606/613-616
BYPASS
(BP/M)
FEEDBACK
(FB)
6.5 V
SOURCE
(S)
+
VTH -
tSAMPLE-OUT
CABLE DROP
COMPENSATION
FB
OUT
DQ
STATE
MACHINE
Reset
VILIMIT
6V
5V
VILIMIT
ILIM
DCMAX
Drive
+
-
REGULATOR
6V
INDUCTANCE
CORRECTION
FAULT
FB Auto-Restart
Open-Loop
t DCSAMPLE-INPUT
MAX
OSCILLATOR
THERMAL
SHUTDOWN
tSAMPLE-OUT
tSAMPLE-INPUT
SAMPLE
DELAY
CONSTANT
CURRENT
ILIM
+
- VILIMIT
Current Limit
Comparator
LEADING
EDGE
BLANKING
Figure 3. Functional Block Diagram.
DRAIN
(D)
SOURCE
(S)
PI-4908-012915
Pin Functional Description
DRAIN (D) Pin:
This pin is the power MOSFET drain connection. It provides internal
operating current for both start-up and steady-state operation.
BYPASS/MULTI-FUNCTIONAL PROGRAMMABLE (BP/M) Pin:
This pin has multiple functions:
1. It is the connection point for an external bypass capacitor for the
internally generated 6 V supply.
2. It is a mode selection for the cable drop compensation for
LNK61X series.
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.
The internal inductance correction circuit uses the forward voltage on
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.
P Package (DIP-8C)
G Package (SMD-8C)
D Package (SO-8C)
FB 1
BP/M 2
D4
8S
7S
6S
5S
FB 1
2
BP/M
4
D
8
S
7
S
6
S
5
S
Figure 4. Pin Configuration.
PI-3491-020615
2
Rev. J 08/16
www.power.com


Features LNK603-606/613-616 LinkSwitch-II Family Energy-Efficient, Accurate CV/CC Switch er for Adapters and Chargers Product H ighlights Dramatically Simplifies CV/CC Converters • Eliminates optocoupler and all secondary CV/CC control circui try • Eliminates all control loop co mpensation circuitry Advanced Performan ce Features • Compensates for transf ormer inductance tolerances • Compen sates for input line voltage variations • Compensates for cable voltage dro p (LNK61X series) • Compensates for external component temperature variatio ns • Very tight IC parameter toleran ces using proprietary trimming technolo gy • Frequency jittering greatly red uces EMI filter cost • Even tighter output tolerances achievable with exter nal resistor selection/trimming • Pr ogrammable switching frequency up to 85 kHz to reduce trans- former size Advan ced Protection/Safety Features • Aut o-restart protection reduces power deli vered by >95% for output short-circuit and control loop faults (open and shorted comp.
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