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Power Integrations

LNK403EG Datasheet Preview

LNK403EG Datasheet

LED Driver IC

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LNK403-409EG
LinkSwitch®-PH Family
LED Driver IC with TRIAC Dimming, Single-Stage PFC and
Primary-Side Constant Current Control
Product Highlights
Dramatically Simplifies Off-line LED Drivers
Flicker-free phase-controlled TRIAC dimming
Single stage power factor corrected and accurate constant
current (CC) output
Eliminates optocoupler and all secondary current control
circuitry
Eliminates all control loop compensation circuitry
Simple primary-side PWM dimming interface
Universal input voltage range
Enables designs that are electrolytic-free
Accurate and Consistent Performance
Compensates for transformer inductance tolerances
Compensates for line input voltage variations
Frequency jittering greatly reduces EMI filter size and costs
Advanced Protection and Safety Features
Auto-restart for short-circuit protection
Open circuit fault detection mode
Automatic thermal shutdown restart with hysteresis
Meets high voltage creepage requirement between DRAIN and
all other signal pins both on PCB and at package
EcoSmart® – Energy Efficient
Low standby power remote ON/OFF feature
(<50 mW at 230 VAC)
No current sense resistors – maximizes efficiency
High efficiency operation, >85% achievable
Green Package
Halogen free and ROHS compliant package
Applications
Off-line LED driver
Description
The LinkSwitch-PH dramatically simplifies implementation of LED
drivers requiring PF >0.9, TRIAC dimmer capability and high
efficiency. The single-stage PF and constant current controller
eliminates passive circuitry required for power factor correction
and electrolytic bulk capacitor. The advanced primary-side control
techniques used by the LinkSwitch-PH device provide accurate
constant current control while eliminating the need for an
optocoupler and secondary-side current control circuitry.
AC
IN D V LinkSwitch-PH
CONTROL
BP
S R FB
Figure 1. Typical Application Schematic.
PI-5430-060710
Output Power Table1,2
Product
85-265 VAC
Minimum Output Power3 Maximum Output Power4
LNK403EG
LNK404EG
LNK405EG
LNK406EG
LNK407EG
LNK408EG
LNK409EG
6.5 W
6.5 W
8.5 W
10 W
12 W
16 W
18 W
12 W
15 W
18 W
22 W
25 W
35 W
50 W
Table 1. Output Power Table.
Notes:
1. Continuous power in an open frame with adequate heat sinking at device local
ambient of 70 °C.
2. Power level calculated on typical LED string voltage with efficiency >80%.
3.
4.
MMianximimuummoouutptpuuttppoowweerrwwitihthCCBBPP==1100m0Fm. F.
LNK403EG CBP = 10 mF.
LinkSwitch-PH incorporates a 725 V power MOSFET, a
continuous-mode PWM controller, a high voltage switched
current source for self biasing, frequency jittering, cycle-by-cycle
current limit and hysteretic thermal shutdown circuitry, all in a
monolithic IC.
www.powerint.com
June 2010
http://www.Datasheet4U.com




Power Integrations

LNK403EG Datasheet Preview

LNK403EG Datasheet

LED Driver IC

No Preview Available !

LNK403-409EG
BYPASS (BP)
VOLTAGE
MONITOR (V)
FEEDBACK (FB)
REFERENCE (R)
BYPASS
CAPACITOR
SELECT
ILIM MI
1V
STOP
LOGIC
3-VT
UV/OV
LINE
SENSE
VBG
5.9 V
REGULATOR
SOFT-START
TIMER
AUTO-RESTART
COUNTER
FAULT
PRESENT
HYSTERETIC
THERMAL
SHUTDOWN
5.9 V
5.0 V
BYPASS PIN
UNDERVOLTAGE
JITTER
CLOCK
OSCILLATOR
Comparator
-
+ FBOFF
DCMAX
OCP
Gate
Driver
SenseFet
LEB
-
IV PFC/CC
CONTROL
IFB
MI
CURRENT LIMIT
COMPARATOR
+
ILIM
VSENSE
FEEDBACK
SENSE
6.4 V
FBOFF
DCMAX
REFERENCE
BLOCK
VBG
IS
DRAIN (D)
PI-5431-060910
SOURCE (S)
Figure 2. Functional Block Diagram.
Pin Functional Description
DRAIN (D) Pin:
This pin is the power MOSFET drain connection. It also
provides internal operating current for both start-up and
steady-state operation.
SOURCE (S) Pin:
This pin is the power MOSFET source connection. It is also the
ground reference for the BYPASS, FEEDBACK, REFERENCE and
VOLTAGE MONITOR pins.
BYPASS (BP) Pin:
This is the connection point for an external bypass capacitor for
the internally generated 5.9 V supply. This pin also provides
output power selection through choice of the BYPASS pin
capacitor value.
FEEDBACK (FB) Pin:
The FEEDBACK pin is used for output voltage feedback. The
current into the FEEDBACK pin is directly proportional to the
output voltage. The FEEDBACK pin also includes circuitry to
protect against open load and overload output conditions.
REFERENCE (R) Pin:
This pin is connected to an external precision resistor and is
used to select between dimming and non-TRIAC dimming
modes of operation.
VOLTAGE MONITOR (V) Pin:
This pin interfaces with an external input line peak detector,
consisting of a rectifier, filter capacitor and resistors. The
applied current is used to control stop logic for line
undervoltage (UV), overvoltage (OV), provide feed-forward to
control the output current and the remote ON/OFF function.
E Package (eSIP-7C)
(Top View)
Exposed Pad
(backside) Internally
Connected to
SOURCE Pin (see
eSIP-7C Package
Drawing)
7D
5S
4 BP
3 FB
2V
1R
Figure 3. Pin Configuration.
PI-5432-060710
2
Rev. A 060910
www.powerint.com


Part Number LNK403EG
Description LED Driver IC
Maker Power Integrations
Total Page 20 Pages
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