st1cc40 STMicroelectronics, st1cc40 Datasheet

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st1cc40

Manufacturer Part Number
st1cc40
Description
3 A, 850 Khz Monolithic Synchronous Step Down Constant Current Led Driver
Manufacturer
STMicroelectronics
Datasheet

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Part Number
Manufacturer
Quantity
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Part Number:
ST1CC40
Manufacturer:
ST
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Part Number:
st1cc40DR
Manufacturer:
ST
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Part Number:
st1cc40PUR
Manufacturer:
ST
Quantity:
20 000
Features
Applications
March 2011
Figure 1.
Step down current mode PWM regulator
3.5 V to 18 V input voltage
Current sensing 100 mV Typ. with 5%
tolerance
Stand-by supply current: 6 μA
Cycle by cycle current limit with frequency
foldback
Integrated 95 mΩ and 69 mΩ power MOSFETs
INH input pin
All ceramic capacitor
Internal compensate current mode control
VFQFPN4x4-8L and SO-8 and packages
LED driving, MR16 bulb replacement
General lighting, architectural lighting
3 A, 850 kHz monolithic synchronous step down constant current
Application circuit
Doc ID 18279 Rev 1
Description
The ST1CC40 is a fixed frequency step-down
DC-DC converter designed to operate as
constant current source. The device operates with
an input supply range from 3.5 V to 18 V and is
able to provide up to 3 A output current with
accurate regulation which makes it suitable to
drive high power LEDs. Synchronous rectification
improves overall system performance. The
current is set by an external resistor through 100
mV Typ feedback voltage thus minimizing the
power loss on the sensing resistor. 850 kHz
switching frequency combined with low
impedance ceramic capacitors minimize possible
output ripple. The device is protected against
thermal overheating, switching over current and
output short circuit. The ST1CC40 is available in
VFQFPN 4mm x 4mm 8 leads package, and
standard SO-8.
SO8
VFQFPN 4x4
ST1CC40
LED driver
www.st.com
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st1cc40 Summary of contents

Page 1

... The device is protected against thermal overheating, switching over current and output short circuit. The ST1CC40 is available in VFQFPN 4mm x 4mm 8 leads package, and standard SO-8. Doc ID 18279 Rev 1 ST1CC40 ...

Page 2

... Content Content 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2/12 Doc ID 18279 Rev 1 ST1CC40 ...

Page 3

... ST1CC40 1 Pin settings 1.1 Pin connection Figure 2. Pin connection (top view) 1.2 Pin description Table 1. Pin description N. VFQFPN S08- Type VINA Unregulated DC input voltage Inhibit control input. Logic low disables operation. Toggling this pin with a periodic logic square wave of varying duty cycle at different INH frequencies controls the brightness of LEDs ...

Page 4

... A Operating junction temperature range Storage temperature range Parameter Maximum thermal resistance (1) junction-ambient Doc ID 18279 Rev 1 Value - INA - -0 -0 -40 to 125 -55 to 150 Value VFQFPN 40 SO8-BW 65 ST1CC40 Unit °C °C Unit °C/W ...

Page 5

... ST1CC40 4 Electrical characteristics T =25 °C, V =12 V, unless otherwise specified Table 4. Electrical characteristics Symbol Operating input voltage V IN range V Feedback voltage pin bias current FB FB High side switch DSON resistance Low side switch DSON resistance I Maximum limiting current ...

Page 6

... An Internal soft start for start-up current limitation and power on delay helps to reduce the inrush current during start-up. The ST1CC40 offer 0.1 V Typ voltage reference with 5% max spread thus minimizes the power loss on the current sensing resistor ...

Page 7

... ST1CC40 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Doc ID 18279 Rev 1 Package mechanical data ® ...

Page 8

... Figure 4. Package dimensions 8/12 mm Min Typ Max 0.80 0.90 1.00 0.02 0.05 0.20 0.23 0.30 0.38 3.90 4.00 4.10 2.82 3.00 3.23 3.90 4.00 4.10 2.05 2.20 2.30 0.80 0.40 0.50 0.60 Doc ID 18279 Rev 1 ST1CC40 inch Min Typ Max 0.0315 0.0354 0.0394 0.0008 0.0020 0.0079 0.009 0.0117 0.0149 0.153 0.157 0.161 0.111 0.118 0.127 0.153 0.157 0.161 0.081 0.087 0.091 0.031 0.016 0.020 0.024 ...

Page 9

... ST1CC40 Table 6. SO8-BW mechanical data Dim ( ddd 1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.15mm (.006inch) in total (both side). Figure 5. Package dimensions mm Min Typ Max 135 1 ...

Page 10

... Order codes 7 Order codes Table 7. Ordering information ST1CC40PUR 10/12 Order codes ST1CC40DR Doc ID 18279 Rev 1 ST1CC40 Package VFQFPN 4x4 8L SO8-BW ...

Page 11

... ST1CC40 8 Revision history Table 8. Document revision history Date 04-Mar-2011 Revision 1 First release Doc ID 18279 Rev 1 Revision history Changes 11/12 ...

Page 12

... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 12/12 Please Read Carefully: © 2011 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 18279 Rev 1 ST1CC40 ...

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