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LNK418E IC Datasheet |
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| Part Number | LNK418E |
| Description | LinkSwitch-PH LED Driver IC |
| Manufacture | Power Integrations |
| Total Page | 20 Pages |
| Datasheet |
This product is not recommended for new designs.
LNK403-410/413-420
LinkSwitch-PH LED Driver IC Family
Single-Stage PFC, Primary-Side Constant Current Control
and TRIAC Dimming/Non-Dimming Options
Product Highlights
Dramatically Simplifies Off-line LED Drivers
• Single-stage combination of power factor correction and
accurate constant-current (CC) output
• Enables very long lifetime designs (no electrolytic capacitors)
• Eliminates optocoupler and all secondary current control
circuitry
• Eliminates control loop compensation circuitry
• Simple primary-side PWM dimming interface
• Universal input voltage range
• LNK403-410 optimized for flicker-free TRIAC dimming
EcoSmart™ – Energy Efficient
• Single-stage PFC combined with output CC control
• Greatly increases efficiency, >90% achievable
• Reduces component count
• No current sense resistors
• Low standby power remote ON/OFF feature
(<50 mW at 230 VAC)
Accurate and Consistent Performance
• Compensates for transformer inductance variations
• Compensates for line input voltage variation
• Frequency jittering greatly reduces EMI filter size and cost
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
Green Package
• Halogen free and ROHS compliant package
Applications
• Off-line LED driver
Description
The LinkSwitchâ„¢-PH dramatically simplifies implementation of
LED drivers requiring long lifetime, high efficiency, PF >0.9, and
TRIAC dimming capability (LNK403-410). The single-stage
combined power factor and constant-current controller eliminates
a switching stage and the electrolytic bulk capacitor. The
advanced primary-side control used by the LinkSwitch-PH device
provides accurate constant current control while eliminating the
need for an optocoupler and current sensing circuits.
RV
AC
IN D V LinkSwitch-PH
CONTROL
BP
S R FB
Figure 1. Typical Application Schematic.
PI-6543-082211
Output Power Table1,2
Product 5
LNK403/413E/L
LNK404/414E/L
LNK405/415E/L
LNK406/416E/L
LNK407/417E/L
LNK408/418E/L
LNK409/419E/L
LNK410/420E/L
RV = 2 MW
85-132 VAC
Minimum
Output
Power 3
Maximum
Output
Power 4
2.5 W
4.5 W
2.5 W
5.5 W
3.8 W
7.0 W
4.5 W
8.0 W
5.5 W
10 W
6.8 W
13.5 W
8.0 W
20 W
18 W
31 W
RV = 4 MW
85-308 VAC
Minimum
Output
Power 3
Maximum
Output
Power 4
6.5 W
12 W
6.5 W
15 W
8.5 W
18 W
10 W
22 W
12 W
25 W
16 W
35 W
18 W
50 W
40 W
78 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.
5.
MPMaiancxikmimaugumem: oeouSutIpPtpu-u7ttCppo,owewSeeIrPrw-w7itFiht.hCCBBPP==1100m0Fm. F.
LNK4x3EG CBP = 10 mF.
LinkSwitch-PH incorporates a 725 V power FET, a continuous-
mode PWM controller, a high-voltage switched current source for
self biasing, frequency jittering, protection circuitry including
cycle-by-cycle current limit and hysteretic thermal shutdown.
eSIP-7C (E Package)
Figure 2. Package Options.
eSIP-7F (L Package)
www.power.com
This Product is Covered by Patents and/or Pending Patent Applications.
June 2015
|
LNK403-410/413-420
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
-
+ DFCBMOAFXF
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-5431-102610
SOURCE (S)
Figure 3. Functional Block Diagram.
Pin Functional Description
DRAIN (D) Pin:
This pin is the power FET drain connection. It also provides
internal operating current for both start-up and steady-state
operation.
SOURCE (S) Pin:
This pin is the power FET 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 configure for dimming (LNK403-410) and non-TRIAC
dimming (LNK413-420) 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 under-
voltage (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
L Package (eSIP-7F)
Exposed Pad
(backside) Internally
Connected to
SOURCE Pin (see
eSIP-7C Package
Drawing)
7D
5S
4 BP
3 FB
2V
1R
135
Lead Bend Outward
from Drawing
R
FB
24
S
V BP
(Refer to eSIP-7F Package
Outline Drawing)
7
D
PI-5432-082411
Figure 4. Pin Configuration.
2
Rev. G 06/15
www.power.com
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| Features | This product is not recommended for new designs. LNK403-410/413-420 LinkSwitch- PH LED Driver IC Family Single-Stage PF C, Primary-Side Constant Current Contro l and TRIAC Dimming/Non-Dimming Options Product Highlights Dramatically Simpl ifies Off-line LED Drivers • Single- stage combination of power factor corre ction and accurate constant-current (CC ) output • Enables very long lifetim e designs (no electrolytic capacitors) • Eliminates optocoupler and all sec ondary current control circuitry • E liminates control loop compensation cir cuitry • Simple primary-side PWM dim ming interface • Universal input vol tage range • LNK403-410 optimized fo r flicker-free TRIAC dimming EcoSmartâ„ ¢ – Energy Efficient • Single-stag e PFC combined with output CC control â €¢ Greatly increases efficiency, >90% achievable • Reduces component count • No current sense resistors • L ow standby power remote ON/OFF feature (<50 mW at 230 VAC) Accurate and Consistent Performance • Compensates for transformer indu. |
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