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STP6NK50Z Scheda tecnica(PDF) 7 Page - Texas Instruments

Il numero della parte STP6NK50Z
Spiegazioni elettronici  A 0.9-A Constant Current Supply with PFC for 100-W LED
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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5.2
Recommended Test Setup
TP3
Buckbiasvoltagemonitor
TP4&TP5
PFCoutputvoltage
TP1&TP2
Loopinjectionpoint
CL2
CurrentProbe:
Buckinductor
ripplecurrent
monitor
J3
ShortpinstoEnable
OnBoardDimming
+
L
N
V2
CL1
CurrentProbe:
PFCinductor
ripplecurrent
monitor
1000uF
250V
A1
V1
J4
Pin1:BuckShutdown
Pin2:GND
Pin3ExternalPWMdimminginput
J2
Pin1:PFCShutdown
Pin2:GND
IEC320
-C13
Plug
90-265
VRMS
ACSource
Constant
Voltage
Load
+
-
5.3
List of Test Points
www.ti.com
Test Setup
Figure 3. UCC28810EVM-002 Recommended Test Set Up
Note:
The 1000-
µF/250-V capacitor on the output is not required if the load is a string of HB-LED’s.
Table 2. Test Point Functions
TEST POINTS
NAME
DESCRIPTION
TP1
Loop injection point
TP2
Loop injection point, PFC output
TP3
VCC_BK
Buck bias voltage output
TP4
PFC+
PFC output voltage
TP5
PFC-
PFC output voltage ground
TP6
VCC_BK
Buck bias voltage input
TP7
GND
Buck bias voltage ground
TP8
GND
Ground connection
TP9
EN
Buck enable
TP10
GND
Buck input voltage ground
TP11
BK_IN
Buck input voltage
J2-1
PFC shutdown
Apply 3.3 V to this pin to shutdown PFC stage
J2-2
GND
J4-1
BK_Shutdown
Apply 3.3 V to this pin to shutdown buck stage
J4-2
GND
J4-3
PWM Dim
Input for external PWM dimming
Short the two pins on J3 to enable on board PWM diming. R26
J3
On board dim
varies dimming duty cycle
SLUU355A – March 2009 – Revised June 2009
A 0.9-A Constant Current Supply with PFC for 100-W LED Lighting Applications
7
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