LNK4024D Switcher Datasheet

LNK4024D Datasheet PDF, Equivalent


Part Number

LNK4024D

Description

CV/CC Switcher

Manufacture

Power Integrations

Total Page 22 Pages
Datasheet
Download LNK4024D Datasheet


LNK4024D
LinkSwitch-4 Family
Energy-Efficient, Accurate Primary-Side Regulated
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
Dynamic base drive technology provides flexibility in choice of BJT
transistor by dynamically optimizing BJT switching characteristics
Extends RBSOA of BJT
Dramatically reduces sensitivity to BJT gain
Compensates for input line voltage variations
Compensates for cable voltage drop
Compensates for external component temperature variations
Very accurate IC parameter tolerances using proprietary trimming
technology
Frequency up to 65 kHz to reduce transformer size
The minimum peak current is fixed to improve transient load response
Enhanced Performance Features
Easy start for starting into capacitive loads (LNK4114D, LNK4115D)
Constant power for high current start-up (LNK4214D, LNK4215D)
13003 drive improved efficiency with 13003 BJT’s (LNK4302S,
LNK4322S)
Advanced Protection/Safety Features
Single fault output overvoltage and short-circuit
Over-temperature protection
Active clamp
EcoSmart– Energy Efficient
Meets DoE 6 and CoC V5 2016 via an optimized quasi-resonant
switching PWM/PFM control
No-load consumption of <30 mW at 230 VAC input
Green Package
Halogen free and RoHS compliant package
Applications
Chargers for cell/cordless phones, PDAs, MP3/portable audio
devices, adapters, networking, etc.
Description
The LinkSwitchTM-4 family of ICs dramatically simplifies low power CV/CC
charger design by eliminating an optocoupler and secondary control
circuitry. The LinkSwitch-4 family adaptive BJT drive technology uses
combined base and emitter switching to boost switching performance
and deliver higher efficiency, wider Reverse Bias Safe Operating Area
(RBSOA) margin and the flexibility to accommodate a wide range of low
cost BJT. The device incorporates a multimode PWM/PFM controller
with quasi resonant switch to maximize the efficiency, meets low
no-load power and at same time maintain fast transient response
greater than 4.3 V with a load change from 0% to 100%.
Figure 3. SOT-23-6 and SO-8 Packages.
LinkSwitch-4
U1
BD
~ LNK4xx2S
ED
VCC
CS
FB
GND
Figure 1. Typical Application (SOT-23-6) (S).
+
PI-7462-122315
+
BD
ED
~ LinkSwitch-4
VCC
U1
LNK40x3D
SBD
CS
FB
GND
Figure 2. Typical Application (SO-8) (D).
PI-7464-010815
Output Power Table
Product3,4
85 - 265 VAC
Features5
Adapter1
Open Frame2
LNK43x2S
LNK40x2S
LNK40x3S
LNK4323S
LNK40x3D
LNK4323D
LNK40x4D
LNK4114D
LNK4214D
LNK4115D
LNK4215D
13003 Drive
STD
STD
STD
STD
STD
STD
Easy Start
Easy Start + Constant Power
Easy Start
Easy Start + Constant Power
5W
6.5 W
8W
8W
10 W
10 W
15 W
15 W
15 W
18 W
18 W
Table 1. Output Power Table.
Notes:
1. Minimum continuous power in a typical enclosed adapter measured at +50 °C
ambient, 85-265 VAC device TJ ≤ 100 °C.
2. Maximum practical continuous power in an open frame design with adequate
heat sinking, measured at +50 °C.
3. Package: D: SO-8 , S: SOT-23-6.
4. Cable compensation factor. x = 0 (no cable compensation),
x = 1 (3% cable compensation) x = 2 (6% cable compensation).
5. Easy Start feature uses the BJT current to directly charge CVCC, allowing
start-up into large output capacitors. 13003 drive feature has the gate drive
optimized for maximum efficiency when using 13003 BJTs. Constant power
feature provides 175% of rated current at start-up, allowing start-up into
large output capacitors (see Figure 15). STD are standard products with all
the advanced performance and protection/safety features.
www.power.com
This Product is Covered by Patents and/or Pending Patent Applications.
May 2018

LNK4024D
LinkSwitch-4
VDD
VDD(REG)
VDD REGULATOR
IFBHT(LO)
IFBHT(START)
VHT ESTIMATOR
VIN
UVP
FEEDBACK
(FB)
VOVP
VOUT
OVP
Reset
Signal
RESET CIRCUIT
CYCLE
TIMING
VVCC(RUN)
CV VOLTAGE
CONTROL
CABLE
COMPENSATION
VVCC(SLEEP)
THERMAL
SHUTDOWN
PFM/PWM
CURRENT
SENSE
(CS)
CS BLANKING
CC CURRENT
CONTROL
VCSTHR
CS
VCMAX
OCP
Figure 4. LNK40x2S, LNK40x3S, LNK4323S and LNK43x2S Functional Block Diagram.
VOLTAGE SUPPLY
(VCC)
BASE DRIVE
(BD)
EMITTER DRIVE
(ED)
GROUND
(GND)
PI-7460-033015
2
Rev. F 05/18
www.power.com


Features LinkSwitch-4 Family Energy-Efficient, A ccurate Primary-Side Regulated CV/CC Sw itcher for Adapters and Chargers Produ ct Highlights Dramatically Simplifies C V/CC Converters • Eliminates optocou pler and all secondary CV/CC control ci rcuitry • Eliminates all control loop compensation circuitry Advanced Perfor mance Features • Dynamic base drive t echnology provides flexibility in choic e of BJT transistor by dynamically opti mizing BJT switching characteristics Extends RBSOA of BJT • Dramatically reduces sensitivity to BJT gain • Co mpensates for input line voltage variat ions • Compensates for cable voltage drop • Compensates for external compo nent temperature variations • Very ac curate IC parameter tolerances using pr oprietary trimming technology • Frequ ency up to 65 kHz to reduce transformer size • The minimum peak current is fixed to improve transient load respons e Enhanced Performance Features • Eas y start for starting into capacitive loads (LNK4114D, LNK4115D) • Constant power for hi.
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