STLC1 STMICROELECTRONICS [STMicroelectronics], STLC1 Datasheet

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STLC1

Manufacturer Part Number
STLC1
Description
LED LAMPS CLUSTER DRIVER
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

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DESCRIPTION
The STLC1, a device realized with the well
established BCD technology, is a fixed frequency
fully monolithic SMPS, with three independent
smart low side driver, primarily intended for
automotive rear led lamps driving.
SCHEMATIC DIAGRAM
September 2002
FULLY MONOLITHIC FIXED FREQUENCY
SMPS
THREE LOW SIDE DRIVERS FOR STOP
TAIL AND TURN LED LAMPS ARRAYS
DRIVING
PROGRAMMABLE LOW SIDE DRIVER
OVER CURRENT LIMIT PROTECTION
UNDER CURRENT DIAGNOSTIC
INPUT OVERVOLTAGE PROTECTION
VERY LOW STAND-BY CURRENT
THERMAL PROTECTION WITH
HYSTERESIS
LMP -OUT
TS -PWM
TURN
STOP
CNTL
TAIL
GND
PULSE WIDTH
CONTROLLER
OSCILLATOR
OSC
OUTAGE
DETECT
LAMP
N
U
P
T
I
B+
COMP
PWM
LED LAMPS CLUSTER DRIVER
PROTECTION
CONTOLLER
TL -L
THERMAL
SWITCH
COMP1
The output voltage is set using a simple resistor
divider. Thermal shutdown with hysteresis, input
over-voltage and overcurrent protections give
robust design solutions.
PWM
M3
ERR AMP
+
-
ST -L
M2
REF
+
-
R
TR -L
s
1.24V
M1
P-OUT
FDBK
REF
TR -DRV
ST -DRV
TL -DRV
PowerSO-20
TM
STLC1
1/16

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STLC1 Summary of contents

Page 1

... INPUT OVERVOLTAGE PROTECTION VERY LOW STAND-BY CURRENT THERMAL PROTECTION WITH HYSTERESIS DESCRIPTION The STLC1, a device realized with the well established BCD technology fixed frequency fully monolithic SMPS, with three independent smart low side driver, primarily intended for automotive rear led lamps driving. ...

Page 2

... STLC1 ABSOLUTE MAXIMUM RATINGS Symbol V Transient Supply Voltage (load dump Operating Supply Voltage B+ V TURN, STOP and TAIL input pins voltage TURN, V STOP, V TAIL I TURN, STOP and TAIL pins current TURN, I STOP, I TAIL I TR-DRV, TL-DRV and ST-DRV pins sink current ...

Page 3

... Internal Error Amplifier Inverting Pin Power MOSFET drain pin A Three State Input. It determine the control logic for TAIL and STOP Low Side Drivers. A weak pulled up signal during lamps No Fault condition and an active pulldown when a Fault condition is detected. Ground STLC1 TM PowerSO-20 STLC1PD 3/16 ...

Page 4

... STLC1 TYPICAL APPLICATION CIRCUIT TAIL TURN STOP RLR RLS RLT RC1 RC2 ELECTRICAL CHARACTERISTICS FOR SMPD SECTION (T Typical values are referred at T Symbol Parameter V Supply Operating Voltage Input Overvoltage SD Shutdown I Total Off State Quiescent SQ Current f PWM Oscillator Frequency V osc R Static drain to ground ...

Page 5

... ST-DRV TL-DRV 220 F REF OUT (see note 2,4 and Fig TAIL B+ TS-PWM REF 16V 16V B+ STLC1 =-40 to 125°C unless J Min. Typ. Max. Unit 500 m 500 m 500 0.95V 200 380 ...

Page 6

... STLC1 ELECTRICAL CHARACTERISTICS FOR FEEDBACK AND CONTROL (T otherwise specified. Typical values are referred at T Symbol Parameter V Lamp Outage Detect LOUT Threshold Voltage V Output Overcurrent H-SHORT Threshold Voltage V External Voltage REF Reference V Internal Band-gap Voltage FB Reference (see schematic diagram) V Device Enabled Lamp ...

Page 7

... CONTROLLER driven. Internal dimming can only be performed on the TAIL and STOP arrays. The TURN array can be externally dimmed (as well as TAIL and STOP) by driving the corresponding input witha a square pulse signal whose maximum is frequency must be 200Hz. STLC1 LAMP-OUTAGE functionality , by using a REF with the ...

Page 8

... STLC1 TS-PWM ENCODING TABLE TYPE LOW (V <0.1V ) TS-PWM REF MID (V <0. floating) TS-PWM REF HIGH (V >0.98V ) TS-PWM REF Figure 1 : Start-up phase and input signal timing diagram (with TS-PWM floating) 8/16 INPUTS ACTIVATED TAIL ARRAY TAIL STOP TAIL AND STOP TAIL STOP TAIL AND STOP ...

Page 9

... Figure 2 : Magnified start-up phase timing diagram Figure 3 : Fault indication on and off timing diagram STLC1 9/16 ...

Page 10

... STLC1 TYPICAL CHARACTERISTICS (See PCB BOM) Figure 4 : Output Voltage vs Output Current Figure 5 : Output Voltage vs Output Current Figure 6 : Output Voltage vs Output Current 10/16 Figure 7 : Output Voltage vs Output Current Figure 8 : Duty Cycle Oscillator Frequency vs CNTL Voltage Figure 9 : LMP-OUT Voltage (Fault Condition) vs LMP-OUT Sinked Current ...

Page 11

... Figure 10 : Total OFF State Quiescent Current vs Temperature Figure 11 : Time to Fault Indication ON vs Temperature Figure 12 : Time to Fault Indication OFF vs Temperature Figure 13 : External Reference Voltage vs Temperature Figure Voltage vs Temperature FB STLC1 11/16 ...

Page 12

... STLC1 Figure 15 : Demoboard Schematic Figure 16 : PCB Components outline 12/16 ...

Page 13

... Figure 17 : PBC Top Layer Figure 18 : PBC Bottom Layer STLC1 13/16 ...

Page 14

... STLC1 PCB BOM REFERENCE L1, L2 C4, C5, C6 C16 C7 C1, C2 C8, C9 C14 C18 C11 C12 R10 R11 R15 R16 R18 R12, R13, R14 R4, R6, R8 R5, R7, R9 TR1 RLP D1 DLP T1 JP1, JP2, JP3 14/16 DESCRIPTION VK200 22 F-35V Electrolytic Capacitor Low ESR 220nF-35V Ceramic Capacitor X7R Dielectric 47 F-35V Electrolytic Capacitor 4 ...

Page 15

... DETAIL A lea d slug a3 DETAIL B 0.35 Gage Plan SEATI NG PLANE (COPLANARITY) 0056635 STLC1 MAX. 0.1417 0.0118 0.1299 0.0039 0.0209 0.0013 0.630 0.5710 0.4370 0.1141 0.0039 0.0433 0.0433 10˚ 8˚ 15/16 ...

Page 16

... STLC1 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...

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