Cherry Semiconductor Introduces New Single Lamp Driver IC
1 February 1999
Cherry Semiconductor Introduces New Single Lamp Driver IC For Type 194 Bulbs
EAST GREENWICH, R.I.--Feb. 1, 1999--New Application-Specific CS-1108 Provides Full Control and Drive
Power for Lamp-Based Applications Requiring Fault Reporting
The new CS-1108 Automotive Single Lamp Driver, an application specific standard product (ASSP) from Cherry Semiconductor Corporation, provides full control and power for type 194 bulbs used in automotive air bag systems, or applications requiring 350 mA of current and fault reporting. In addition, the CS-1108 incorporates built-in diagnostics that detect either an open circuit or short circuit condition in the lamp. The low-cost, feature rich CS-1108 is the newest in Cherry's line of standard automotive ICs. The small-footprint device is offered in an 8-lead plastic small outline integrated circuit (SOIC) narrow package with internally fused leads.
The CS-1108's fault detection capabilities include Vcc sense detection, which forces the lamp to turn on if the supply voltage (Vcc) to the CS-1108 falls below a set value or is not present. Fault condition detection is indicated by a low level (active low) on the chip's fault reporting pin. Internal pull-up circuitry enables the output to turn on and light the lamp if the device's Control pin (for on/off control) is floating.
The CS-1108 also provides both overcurrent and overtemperature protection. An on-chip duty-cycle circuit provides overcurrent protection for the device if the lamp current exceeds an internally programmed limit (typically 500 mA). The device enters a duty-cycle mode to reduce its internal power dissipation until the drive current returns to a safe level. The CS-1108's internal circuitry provides overtemperature shutdown control, shutting off the output and turning off the lamp if the die temperature rises above 180 degrees Celsius. The lamp turns back on when the temperature returns to a normal level.
In the on-mode, the CS-1108 draws a supply current of 6mA maximum. In the off-mode, current draw drops to just 250uA maximum. The CS-1108 runs from a 5V nominal supply voltage and is rated for a temperature range of -40 degrees Celsius to +85 degrees Celsius.
In quantities of 1000 pieces, the CS-1108 is priced at $0.79 each.
Data sheets and samples can be requested via the Cherry Semiconductor website at http://www.cherry-semi.com. Reference designs, demonstration kits and samples are available to qualified individuals through Cherry's local sales and applications personnel.
Cherry Semiconductor Corporation designs and manufactures standard, semi-custom and custom integrated circuits for the automotive, communications, computer and power management markets worldwide. As both a QS 9000 and ISO 9000 certified facility, Cherry Semiconductor pursues a corporate quality goal of 2.0 defects per billion on all new product. Cherry Semiconductor Corporation is a wholly owned subsidiary of The Cherry Corporation, Waukegan, Illinois.
For more information, contact: Cherry Semiconductor Corporation, 2000 South County Trail, East Greenwich, RI 02818 (USA). Phone: 1-800-272-3601. FAX: (401) 885-5786. E-mail: info@cherry-semi.com. Internet: www.cherry-semi.com
Note To Editors:
Please send reader inquiries to: John Wooff, ADTRACK, 6060 Huntington Ct., N.E., Cedar Rapids, IA 52402, USA.