Power LNK456D Led driver ic with triac dimming, single-stage pfc and constant current control for non-isolated application Datasheet

LNK454/456-458/460
LinkSwitch-PL Family
®
LED Driver IC with TRIAC Dimming, Single-Stage PFC and
Constant Current Control for Non-Isolated Applications
Product Highlights
AC
IN
LinkSwitch-PL
PR
EL
IM
IN
AR
Y
Dramatically Simplifies Off-line LED Drivers
• Single stage power factor correction and accurate constant
current (CC) output
• Flicker-free phase-controlled TRIAC dimming
• Very low component count with small non-electrolytic bulk
capacitor, for compact replacement lamp designs
• Compact SO8 package
• Completely eliminates control loop compensation
D
CONTROL
BP
Advanced Performance Features
• Optimized for non-isolated flyback designs
• Frequency jitter greatly reduces EMI filter size and costs
• Low dissipation direct sensing of LED current
Advanced Protection and Safety Features
• 725 V integrated MOSFET allows small bulk capacitance and
maximizes power capability
• Latching shutdown protection for short-circuit / open feedback
and output overvoltage
• Auto-restart for overload condition
• Hysteretic thermal shutdown
• Meets high-voltage creepage between DRAIN and all other pins
both on PCB and at package
EcoSmart ® - Energy Efficient
• High power factor optimizes system lumen per watt by
reducing input VA
• Control algorithm balances switching and conduction losses
over line and load to maintain optimum efficiency
• Cycle skipping regulation for abnormally low output power to
clamp peak output current delivered
Figure 1.
PI-5835-060710
Basic Application Schematic.
Output Power Table
Product 2
LNK454D
LNK456D
LNK457D/V
LNK458V
LNK460V
85-265 VAC
Minimum Output
Maximum Output
Power1
Power1
1.5 W
3W
3W
6W
4W
8W
6W
11.5 W
8W
16 W
Table 1. Output Power Table.
Notes:
1. Maximum practical continuous power in an open frame design with adequate
heat sinking, measured at +50 °C ambient (see Key Applications Considerations
for more information).
2. Packages: D: SO-8C, V: eDIP-12.
Description
Output Current
The LinkSwitch-PL family enables a very small and low cost
single-stage power factor corrected constant current driver for
solid state lighting. Optimized for direct LED current sensing, the
LinkSwitch-PL operates over a wide input voltage range
delivering an output power of up to 16 W. The LinkSwitch-PL
control algorithm provides flicker-free TRIAC dimming with minimal
external components.
Each device incorporates a 725 V rated power MOSFET, a novel
discontinuous mode variable frequency variable on-time controller,
frequency jitter, cycle by cycle current limit and hysteretic thermal
shutdown in a monolithic 4-pin IC, available in SO-8C and
eDIP-12 packages.
Number of
Serial LEDs
1
2
3
4
5
6
7
8
9
10
11
12
Figure 2.
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FB
S
350 mA
500 mA
700 mA
1000 mA
LNK454
LNK454
LNK456
LNK456
LNK457
LNK457
LNK458
LNK458
LNK458
LNK460
LNK460
LNK460
LNK454
LNK456
LNK456
LNK457
LNK458
LNK458
LNK460
LNK460
LNK460
LNK454
LNK456
LNK457
LNK458
LNK460
LNK460
LNK456
LNK457
LNK458
LNK460
Device Selection based on Length of Output LED Series String and
Current. A Typical Voltage Drop of 3.5 V per LED is Assumed.
PRELIMINARY
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
June 2010
LNK454/456-458/460
DRAIN (D)
REGULATOR
5.85 V
BYPASS (BP)
UV
4.9 V
ILIM
ILIM
+
V_ILIM
CURRENT LIMIT
SOA
STATE MACHINE
SOA
VFB(SK)
VFB(LO)
+
Q
SET
S
Q
CLR
R
UV
+
Zero Crossing
PHASE
MEASUREMENT
VREF DAC
IFB
+
V_ZLIM
PR
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1 µA
FEEDBACK (FB)
+
DIGITAL
INTEGRATOR
FILTER
Update
CLK
AUTO-RESTART
INC/DEC
VARIABLE FREQUENCY/
DUTY CONTROLLER
S
SET
Q
R
CLR
Q
ON-TIME
EXTENSION
SOURCE (S)
PI-5893-060210
Figure 2.
Functional Block Diagram.
Pin Functional Description
DRAIN (D) Pin:
High-voltage power MOSFET drain connection. The internal
start-up bias current is drawn from this pin through a switched
high-voltage current source. Drain current sensing and
associated controller functions are also performed using this pin.
D Package (SO-8C)
FB
BP
SOURCE (S) Pin:
Power MOSFET source connection. Ground reference for
BYPASS and FEEDBACK pins.
BYPASS (BP) Pin:
Connection point for the external bypass capacitor for the
internally generated 5.85 V supply.
D
1
8
2
7
4
6
5
S
S
S
S
Exposed Pad Internally
Connected to SOURCE Pin
V Package (eDIP-12)
FEEDBACK (FB) Pin:
LED current sensing pin. During normal operation the 290 mV
threshold determines the average value of the current flowing
through the load sense resistor.
A second higher threshold clamps excessive output current ripple.
An additional higher threshold is used to protect against output
short-circuit and overvoltage conditions.
S 12
1 NC
S 11
2 FB
S 10
3 BP
S 9
4 NC
S 8
5 NC
S 7
6 D
PI-5836a-0526–10
Figure 3.
2
Rev. A 06/10
Pin Configuration (Top View).
PRELIMINARY
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are subject to change without notice.
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LNK454/456-458/460
AC
IN
D
DES
DZOV
RES
ROV
LinkSwitch-PL
CONTROL
BP
FB
PR
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S
CF
RSENSE
RF
PI-5837-060710
Figure 4.
Typical Application Schematic.
Functional Description
The LinkSwitch-PL combines a high-voltage power MOSFET
switch with a power supply controller in one device. The IC
provides a single stage power factor correction plus LED
current control. The LinkSwitch-PL controller consists of an
oscillator, feedback (sense and logic) circuit, 5.85 V regulator,
hysteretic over-temperature protection, frequency jittering,
cycle-by-cycle current limit, loop compensation circuitry, autorestart, switching on-time extension, power factor and constant
current control.
Latching shutdown protection is triggered by a FEEDBACK pin
voltage in excess of 2 V. This feature can be used to provide
output overvoltage protection (via DZOV and ROV, in Figure 4),
which triggers the IC to latch off. This condition is reset when
the BYPASS pin voltage drops below 4.9 V, after removal of the
AC input.
In a direct LED current sensing configuration, the average
FEEDBACK pin voltage is a replica of the LED current, scaled
by the sense resistor (RSENSE in Figure 4). A small low-pass filter
(RF and CF in Figure 4) reduces high frequency noise at the
FEEDBACK pin.
Latch Off
Figure 5 illustrates the operating regions of the FEEDBACK pin
voltage. The LinkSwitch-PL sets its operating point such that
the average FEEDBACK pin voltage in steady-state operation is
290 mV. This threshold is low to minimize the sensing resistor
dissipation. The internal MOSFET switching frequency and
on-time are updated once every input AC half-cycle to regulate
the output current and maintain high power factor.
2V
Cycle Skipping
Mode
520 mV
If the FEEDBACK pin peak voltage exceeds 520 mV, cycle
skipping mode is triggered and the power processed by the
integrated MOSFET is clamped on a cycle-by-cycle basis.
Switching frequency may vary during an input voltage half-cycle
to reduce thermal stress on the output LEDs.
Normal Operation
290 mV
PI-5838-041910
Figure 5.
FEEDBACK Pin Operation Voltage Thresholds.
PRELIMINARY
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3
Rev. A 06/10
LNK454/456-458/460
VFB
ϕOS
ϕOL
ϕOL
VFB(ϕ)
ϕOS
VFB(ϕ)
Phase
Angle
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Phase
Angle
0°
0°
180°
180°
VLINE
VTRIAC
ϕ
0°
ϕ
Phase
Angle
Phase
Angle
0°
TRIAC
Conduction
TRIAC
Conduction
Leading Edge
TRIAC Dimmers
Figure 6.
PI-5894a-052610
Feedback Voltage vs. Phase Angle Dimming Characteristics.
The LinkSwitch-PL integrates several features to improve
dimming range and reduce external circuit complexity when
using a phase-controlled TRIAC dimmer. The output LED
current is controlled by the FEEDBACK pin voltage which
changes proportionally to the TRIAC dimmer conduction angle.
The conduction angle decreases, the voltage at the FEEDBACK
pin decreases causing the average LED current to decrease.
The FEEDBACK pin voltage adjustment is initiated at approximately 20% of the main half-cycle duration. When this (jOS)
threshold is exceeded, VFB and the output LED current are
reduced until a second phase angle threshold is reached.
When this happens, with the TRIAC conduction angle being
4
Phase
Angle
Trailing Edge
TRIAC Dimmers
TRIAC (Phase-Controlled) Dimming
Rev. A 06/10
Phase
Angle
very limited, the IC runs open loop (j OL region) and the
integrated MOSFET processes as much power as the heavily
chopped input voltage will allow creating a light output that is
deeply dimmed.
The 520 mV clamping feedback threshold is also linearly reduced
during dimming to control LED current ripple.
To help maintain the holding current of the TRIAC in the dimmer,
LinkSwitch-PL extends the MOSFET on-time towards the zero
crossings of the AC input voltage providing an active bleed or
holding current function. This on-time extension is carefully
limited to avoid deterioration of input current harmonic content
and limit total harmonic distortion (THD).
PRELIMINARY
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are subject to change without notice.
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LNK454/456-458/460
IC Supply and BYPASS Pin
The internal 5.85 V regulator charges the bypass capacitor
connected to the BYPASS pin to 5.85 V by drawing current
from the voltage on the DRAIN pin whenever the power MOSFET
is off. The BYPASS pin is the internal supply voltage node.
When the power MOSFET is on, the device operates from the
energy stored in the bypass capacitor. Extremely low power
consumption of the internal circuitry allows LinkSwitch-PL to
operate continuously from current it takes from the DRAIN pin. A
bypass capacitor value of 1 µF is sufficient for both high
frequency decoupling and energy storage.
Overload Protection
In case of overload, the system will increase the operating
frequency and on-time each AC half-cycle until the maximum
frequency and maximum on-time are reached. When this state
is reached, by the next half-cycle, the controller will enter
auto-restart protection, thus inhibiting the gate of the power
MOSFET for approximately 1.28 s if the main line frequency is
50 Hz, 1.02 s if it is 60 Hz. After this auto-restart off-time
expires, the circuit will start again, exactly as at start-up, i.e. at
fMIN and tON(MIN), stepping up until regulation is achieved again.
In case of a persistent overload condition, the auto-restart duty
cycle DCAR will typically be as low as 33%.
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During phase angle dimming when the conduction angle is
small the AC input voltage is present for only short periods of
time. In that case the IC should not rely on the integrated high
voltage current source, but instead external bias circuitry should
be used to supply the IC from the output (DES and RES in Figure
4). If the output voltage is less than 7 V, external bias circuitry
should be implemented, by using a bias winding on the primary
of the transformer with a small signal rectifier and an electrolytic
capacitor with a value based on maximum IC consumption and
maximum phase dimming conduction angles.
properly designed supply will not operate in this mode under
normal load conditions. A power supply designed correctly will
operate within the switching frequency range [fMIN … fMAX ], with
an on-time falling between tON(MIN) and tON(MAX) when connected
to a normal load.
Start-up, Switching Frequency, On-time Range
At start-up the controller uses an initial switching frequency fMIN
and minimum on-time tON(MIN). The charging of the output
capacitor together with the energy delivery to the output LEDs
as soon as their anode-cathode threshold is reached
determines a step-by-step increase of the operating power
MOSFET switching frequency and on-time every half-cycle of
the main input voltage.
When the operating conditions (start-up or large transients)
allow for only low energy processing (low frequency and on-time),
the voltage across the input bulk capacitance will not reach zero
even if the main voltage crosses zero. During these conditions the
IC sets the reference voltage on the FEEDBACK pin to one half
of its preset level (145 mV), to avoid overshoot of the output LED
current. Once the FEEDBACK pin voltage exceeds this reduced
threshold (with the zero crossing on the bulk capacitor being
achieved), then the FEEDBACK pin voltage is restored to the
normal 290 mV level.
The steady state switching frequency and on-time is determined
by the line voltage, voltage drop across the LEDs and system
overall power transfer efficiency.
At light load when the device reaches the minimum frequency
fMIN and on-time tON(MIN), the controller regulates by skipping
cycles. In this mode of operation the input current is not power
factor corrected and the average output current is not
guaranteed to fall within the normal range. The FEEDBACK pin
cycle skipping threshold is reduced from approximately twice
the normal regulation level down to just above the level required
to limit output power delivery under these conditions. A
Auto-restart is inhibited during phase dimming when the TRIAC
conduction duty cycle is less than 60%.
Output Overvoltage Protection
If a no-load condition is present on the output of the supply, the
output overvoltage Zener (DZOV in Figure 4) will conduct once its
threshold is reached. A voltage VOV in excess of VFB(LO) = 2 V will
appear across the FEEDBACK pin and the IC will latch off. Normal
operation will be restored once the BYPASS pin voltage drops
below 4.9 V and the IC goes through a new start-up phase.
Output Short-Circuit
If the output of the supply (i.e. the LED load) is short-circuited,
then a large amount of energy will be delivered to the sense
resistor, generating a high voltage at the FEEDBACK pin. If this
condition develops more than 2 V on the FEEDBACK pin, then
the IC will interpret this event as an output short-circuit and will
trigger latching shutdown. Normal operation will resume after
cycling the AC input such that the BYPASS pin voltage drops
below 4.9 V and the IC goes through a new start-up phase.
Safe Operating Area (SOA) Protection
If 3 consecutive cycles of the power MOSFET are prematurely
terminated due to the power MOSFET current exceeding the
current limit after the leading edge blanking time, SOA protection
mode is triggered and the IC will trigger latching shutdown.
Normal operation will resume after cycling the AC input such that
the BYPASS pin voltage drops below 4.9 V and the IC goes
through a new start-up phase.
Hysteretic Thermal Shutdown
The thermal shutdown circuitry senses the die junction
temperature. The thermal shutdown threshold is set to 142 °C
typical with a 75 °C hysteresis. When the die temperature rises
above this threshold (142 °C) the power MOSFET is disabled
and remains disabled until the die temperature falls by 75 °C, at
which point the power MOSFET is re-enabled.
PRELIMINARY
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are subject to change without notice.
5
Rev. A 06/10
LNK454/456-458/460
Absolute Maximum Ratings(1,4)
DRAIN Pin Peak Current: LNK454.................. 400 mA (750 mA)
LNK456.................850 mA (1450 mA)
LNK457.............. 1350 mA (2000 mA)
LNK458...............1750 mA (2650 mA)
LNK460...............2700 mA (5100 mA)
DRAIN Pin Voltage ……………………….............. -0.3 V to 725 V
FEEDBACK Pin Voltage ………………………............. -0.3 to 9 V
BYPASS Pin Voltage ……………………….................. -0.3 to 9 V
Lead Temperature(3) .................................................................260 °C
Storage Temperature ………………….................... -65 to 150 °C
Operating Junction Temperature(2).........................-40 to 150 °C
Notes:
1. All voltages referenced to SOURCE, TA = 25 °C.
2. Normally limited by internal circuitry.
3. 1/16 in. from case for 5 seconds.
4. The Absolute Maximum Ratings specified may be applied, one at a time without causing permanent damage to the
product. Exposure to Absolute Maximum Ratings for extended periods of time may affect product reliability.
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Thermal Resistance
Thermal Resistance: D (SO-8C) Package:
(qJA) .................................. 100 °C/W(1), 80 °C/W(2)
(qJC) ........................................................ 30 °C/W(3)
V (eDIP) Package:
(qJA) .................................... 68 °C/W(1), 58 °C/W(2)
(qJC) ...........................................................2 °C/W(4)
Parameter
Symbol
Notes:
1. Soldered to 0.36 sq. in. (232 mm2), 2 oz. (610g/m2) copper clad,
with no external heat sink attached.
2. Soldered to 1 sq. in. (645 mm2), 2 oz. (610g/m2) copper clad,
with no external heat sink attached.
3. Measured on the SOURCE pin close to plastic interface.
4. Measured at the surface of exposed pad.
Conditions
SOURCE = 0 V; TJ = -40 to +125 °C
(Unless Otherwise Specified)
Min
Typ
Max
Units
110
122
134
kHz
Control Functions
Maximum Output
Frequency
fMAX
TJ = 25 °C
Minimum Output
Frequency
fMIN
TJ = 25 °C
Maximum Switch
ON-Time
tON(MAX)
Minimum Switch
ON-Time
tON(MIN)
ON-Time Extension
Maximum Duty Cycle
Average
Peak-Peak Jitter
Average
6
25.8
Peak-Peak Jitter
28.7
%
31.6
kHz
6
%
TJ = 25 °C
5.74
ms
TJ = 25 °C
1.18
ms
tEXT
5.2
ms
DCMAX
70
%
FEEDBACK Pin Voltage
VFB
FEEDBACK Pin Voltage
Triggering Cycle
Skipping Mode
VFB(SK)
520
mV
FEEDBACK Pin Voltage
for IC Latch-OFF
VFB(LO)
2000
mV
Feedback Pull-up
Current
6
Rev. A 06/10
TJ = 25 °C
IFB
275
-1.3
290
-1.0
305
-0.7
mV
mA
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are subject to change without notice.
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LNK454/456-458/460
Parameter
Symbol
Conditions
SOURCE = 0 V; TJ = -40 to +125 °C
(Unless Otherwise Specified)
IS1
VFB > VFB(SK)
(MOSFET not switching)
Min
Typ
Max
Units
Control Function (cont.)
DRAIN Supply Current
LNK454
530
LNK456
585
LNK457
650
LNK458
730
LNK460
1050
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IS2
VFB = 0 V
(MOSFET switching
at fMAX)
ICH1
BYPASS Pin
Charge Current
ICH2
BYPASS Pin Voltage
mA
450
mA
VBP = 0 V,
TJ = 25 °C
LNK454
-5.9
-4.2
-2.5
LNK456/457/458
-8.3
-5.9
-3.5
LNK460
-11.9
-8.5
-5.1
VBP = 4 V,
TJ = 25 °C
LNK454
-3.4
-2.4
-1.4
LNK456/457/458
-5.2
-3.7
-2.2
LNK460
-8.0
-5.7
-3.4
5.60
5.85
6.15
VBP
mA
mA
V
Circuit Protection
Current Limit
ILIMIT(MIN)
di/dt = 160 mA/ms
TJ = 25 °C
LNK454
245
264
283
di/dt = 325 mA/ms
TJ = 25 °C
LNK456
491
528
565
di/dt = 490 mA/ms
TJ = 25 °C
LNK457
790
850
910
di/dt = 650 mA/ms
TJ = 25 °C
LNK458
1023
1100
1177
di/dt = 980 mA/ms
TJ = 25 °C
LNK460
1581
1700
1819
160
200
ns
150
ns
mA
Leading Edge
Blanking Time
tLEB
TJ = 25 °C
Current Limit Delay
tILD
TJ = 25 °C
Thermal Shutdown
Temperature
TSD
Thermal Shutdown
Hysteresis
TSD(H)
75
°C
VBP(RESET)
4.9
V
BYPASS Pin Power-up
Reset Threshold Voltage
135
PRELIMINARY
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142
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
150
°C
7
Rev. A 06/10
LNK454/456-458/460
Parameter
Symbol
Conditions
SOURCE = 0 V; TJ = -40 to +125 °C
(Unless Otherwise Specified)
Min
Typ
Max
TJ = 25 °C
23.1
26.6
TJ = 100 °C
34.4
39.8
TJ = 25 °C
11.7
13.5
TJ = 100 °C
17.5
20.2
TJ = 25 °C
6.9
7.9
TJ = 100 °C
10.4
11.9
TJ = 25 °C
4.4
5.1
TJ = 100 °C
6.7
7.6
TJ = 25 °C
2.2
2.6
TJ = 100 °C
3.3
3.9
Units
Output
LNK454
ID = 26 mA
LNK456
ID = 53 mA
RDS(ON)
LNK457
ID = 85 mA
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ON-State Resistance
LNK458
ID = 110 mA
LNK460
ID = 170 mA
OFF-State Leakage
IDSS1
VBP = 6.2 V, VFB > VFB(SK) , VDS = 580 V,
TJ = 125 °C
Breakdown Voltage
BVDSS
VBP = 6.2 V, VFB > VFB(SK), TJ = 25 °C
DRAIN Supply Voltage
Auto-Restart OFF-Time
tAR(OFF)
Auto-Restart Duty Cycle
DCAR
8
Rev. A 06/10
50
W
mA
725
V
50
V
fMAIN = 50 Hz
1.28
fMAIN = 60 Hz
1.02
33
s
%
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LNK454/456-458/460
100
110
Scaling Factors:
LNK454
0.3
LNK456
0.6
LNK457
1.0
LNK458
1.55
LNK460
3.1
100
90
80
Power (mW)
Scaling Factors:
LNK454
0.3
LNK456
0.6
LNK457
1.0
LNK458
1.55
LNK460
3.1
PI-6005-060210
DRAIN Capacitance (pF)
1000
10
70
PI-6007-060210
Typical Performance Characteristics
60
50
40
30
20
10
0
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0
0
100
200
300
400
500
600
0
100 200 300 400 500 600 700
DRAIN Voltage (V)
Figure 7.
DRAIN Voltage (V)
Drain Capacitance vs. Drain Voltage.
Figure 8.
Power vs. Drain Voltage.
PI-6006-060210
1.2
DRAIN Current (A)
1
0.8
Scaling Factors:
LNK454
0.3
LNK456
0.6
LNK457
1.0
LNK458
1.55
LNK460
3.1
0.6
0.4
0.2
LNK457 TCASE = 25 °C
LNK457 TCASE = 100 °C
0
0
2
4
6
8 10 12 14 16 18 20
DRAIN Voltage (V)
Figure 9.
Drain Current vs. Drain Voltage.
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9
Rev. A 06/10
LNK454/456-458/460
SO-8C (D Package)
4
B
0.10 (0.004) C A-B 2X
2
DETAIL A
4.90 (0.193) BSC
A
8
4
D
5
2 3.90 (0.154) BSC
GAUGE
PLANE
SEATING
PLANE
6.00 (0.236) BSC
C
0-8
1.04 (0.041) REF
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0.10 (0.004) C D
2X
Pin 1 ID
1
0.40 (0.016)
1.27 (0.050)
0.20 (0.008) C
2X
7X 0.31 - 0.51 (0.012 - 0.020)
0.25 (0.010) M C A-B D
1.27 (0.050) BSC
1.35 (0.053)
1.75 (0.069)
4
0.25 (0.010)
BSC
1.25 - 1.65
(0.049 - 0.065)
0.10 (0.004)
0.25 (0.010)
0.10 (0.004) C
DETAIL A
H
7X
SEATING PLANE
0.17 (0.007)
0.25 (0.010)
C
Reference
Solder Pad
Dimensions
2.00 (0.079)
4.90 (0.193)
Notes:
1. JEDEC reference: MS-012.
2. Package outline exclusive of mold flash and metal burr.
3. Package outline inclusive of plating thickness.
4. Datums A and B to be determined at datum plane H.
5. Controlling dimensions are in millimeters. Inch dimensions
are shown in parenthesis. Angles in degrees.
D07C
10
Rev. A 06/10
1.27 (0.050)
0.60 (0.024)
PI-4526-040110
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LNK454/456-458/460
eDIP-12 (V Package)
0.004 [0.10] C A
2
Pin #1 I.D.
(Laser Marked)
Seating Plane
0.316 [8.03]
Ref.
2X
0.004 [0.10] C B
1
2 3 4
5
C
0.010 [0.25] Ref.
0.400 [10.16]
0.016 [0.41]
12×
0.011 [0.28]
A
6
6
0.412 [10.46]
Ref.
0.306 [7.77]
Ref.
2
0.213 [5.41]
Ref.
12 11 10 9 8
B
8
0.059 [1.50]
Ref, typ.
0.436 [11.08]
0.406 [10.32]
7
7
Detail A
TOP VIEW
5 °± 4°
0.104 [2.65] Ref.
END VIEW
0.356 [9.04]
Ref.
0.019 [0.48]
Ref.
0.092 [2.34]
0.086 [2.18]
0.049 [1.23]
0.046 [1.16]
0.022 [0.56]
Ref.
0.192 [4.87]
Ref.
H
0.031 [0.80]
0.028 [0.72]
0.020 [0.51]
Ref.
0.070 [1.78]
0.028 [0.71]
Ref.
SIDE VIEW
0.059 [1.50]
Ref, typ.
7
0.400 [10.16]
PR
EL
IM
IN
AR
Y
0.350 [8.89]
1
DETAIL A (Not drawn to scale)
12
3 4
0.023 [0.58]
12×
0.018 [0.46]
0.010 (0.25) M C A B
BOTTOM VIEW
Notes:
1. Dimensioning and tolerancing
per ASME Y14.5M-1994.
2. Dimensions noted are determined
at the outermost extremes of the plastic
body exclusive of mold flash, tie bar
burrs, gate burrs, and interlead flash,
but including any mismatch between the
top and bottom of the plastic body. Maximum
mold protrusion is 0.010 [0.25] per side
3. Dimensions noted are inclusive of
plating thickness.
4. Does not include inter-lead flash or
protrusions.
5. Controlling dimensions in inches (mm).
6. Datums A & B to be determined at Datum H.
7. Measured with the leads constrained to be
perpendicular to Datum C.
8. Measured with the leads unconstrained.
9. Lead numbering per JEDEC SPP-012.
PI-5556-051010
Part Ordering Information
• LinkSwitch Product Family
• PL Series Number
• Package Identifier
D
SO-8C
V
eDIP-12
• Package Material
LNK 454
D G
G
GREEN: Halogen Free and RoHS Compliant
PRELIMINARY
www.powerint.com
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
11
Rev. A 06/10
Revision
A
Notes
Date
Preliminary Release
06/09/10
For the latest updates, visit our website: www.powerint.com
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power
Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS MAKES
NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
Patent Information
The products and applications illustrated herein (including transformer construction and circuits external to the products) may be covered by
one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A
complete list of Power Integrations patents may be found at www.powerint.com. Power Integrations grants its customers a license under
certain patent rights as set forth at http://www.powerint.com/ip.htm.
Life Support Policy
POWER INTEGRATIONS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF POWER INTEGRATIONS. As used herein:
1. A Life support device or system is one which, (i) is intended for surgical implant into the body, or (ii) supports or sustains life, and (iii) whose failure to perform, when properly used in accordance with instructions for use, can be reasonably expected to result in significant
injury or death to the user.
2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause
the failure of the life support device or system, or to affect its safety or effectiveness.
The PI logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, EcoSmart, Clampless, E-Shield, Filterfuse, StakFET, PI Expert
and PI FACTS are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies.
©2010, Power Integrations, Inc.
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