High Performance Current Mode Controllers Resistive Touch Screen Controller UC3843BD1R2G
ic programmer circuit
,programmable audio chip
UC3843BD1R2G High Performance Current Mode Controllers Resistive Touch Screen Controller
Features
• Trimmed Oscillator for Precise Frequency Control
• Oscillator Frequency Guaranteed at 250 kHz
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Latching PWM for Cycle−By−Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
• Pb−Free Packages are Available
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and DC−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
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Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
These devices are available in an 8−pin dual−in−line and surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage.
The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
STOCK LIST
| PIC32MX440F512H-80I/PT | 1500 | MICROCHIP | 14+ | TQFP-64 |
| 10MQ100NTRPBF | 9000 | VISHAY | 15+ | SMA |
| DS1608C-103MLC | 5970 | COILCRAFT | 16+ | SMD |
| P6SMB200CA | 25000 | VISHAY | 16+ | DO-214AA |
| MIC29302AWU | 6430 | MICREL | 15+ | TO-263 |
| P6SMB200A | 25000 | VISHAY | 16+ | DO-214AA |
| P6SMB130CA | 25000 | VISHAY | 16+ | DO-214AA |
| P6SMB440A-E3/52 | 30000 | VISHAY | 16+ | DO-214AA |
| P6SMB6.8A-E3/52T | 25000 | VISHAY | 16+ | DO-214AA |
| P6SMB39CA | 25000 | VISHAY | 16+ | DO-214AA |
| P6SMB220A | 25000 | VISHAY | 16+ | DO-214AA |
| DO1608C-104MLC | 1500 | COILCRAFT | 16+ | SMD |
| ACNW3190 | 2450 | AVAGO | 16+ | SOP-8 |
| 88E6061-A1-LAJ1C000 | 2696 | MARVELL | 15+ | QFP |
| DLW5BTN251SQ2L | 2100 | MURATA | 16+ | SMD |
| PCA9557BS | 12540 | 15+ | QFN | |
| ISL6405ERZ-T | 6088 | INTERSIL | 15+ | QFN32 |
| CS5532-ASZ | 1343 | CIRRUS | 13+ | SSOP20 |
| 594D337X0016R2TE | 1200 | VISHAY | 14+ | SMD |
| TIP35C | 4532 | ST | 15+ | TO-3P |
| PDS4200H-13 | 13820 | DIODES | 10+ | SMD |
| 1N5819M | 9000 | GS | 16+ | LL41 |
| ZM4740A | 15000 | ST | 15+ | LL41 |
| MBRA2H100T3G | 25000 | ON | 16+ | DO-214 |
| MURA105T3G | 25000 | ON | 16+ | DO-201 |
| MUR260RLG | 25000 | ON | 16+ | DO-41 |
| ZM4746A-GS18 | 5000 | ST | 15+ | LL41 |
| LTST-C191KGKT | 20000 | LITEON | 11+ | SMD |
| LTST-C191KRKT | 20000 | LITEON | 11+ | SMD |
| PESD0603-140 | 25000 | TYCO | 16+ | SMD |
| PDS5100H-13 | 13860 | DIODES | 14+ | SMD |
| PDS3200-13 | 13800 | DIODES | 11+ | SMD |
| ZM4742A | 20000 | VISHAY | 15+ | LL41 |
| ZM4739A | 15000 | ST | 15+ | LL41 |
| ZM4732A | 15000 | ST | 15+ | LL41 |
| 0433001.NR | 5000 | LITTELFUSE | 14+ | SMD |
| MM9329-2700RB5 | 10000 | MURATA | 16+ | SMD |
| MBRA340T3G | 25000 | ON | 16+ | DO-214 |
| MURA120T3G | 25000 | ON | 16+ | SMA |
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