Driver with Thermal Monitoring U6805B Description driver U68

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Driver with Thermal Monitoring U6805B Description driver U68

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Input Comparators with Schmitt-trigger Characteristics Input Clamping Current Capability Integrated Protection Cells (EMC, ESD, Dedicated Input Stages Common Shutdown Junction-temperature Monitor Reset with Hysteresis Voltage Protection According Human Body Model: ±2000 Output Stages: Short-circuit Protected Load-dump Protected Crosstalk Adjacent Channels Jump Start Possible
Driver with Thermal Monitoring U6805B
Description
driver U6805B includes non-inverted current-limited output stages with open collector. Common thermal shutdown protects outputs against critical junction temperature. Each output sink current parallel output operation possible. digital inputs have Schmitt-trigger function with pull-up resistors
Figure Block Diagram
Thermal shutdown
Undervoltage detection
Rev. 4763A-AUTO-11/03
Configuration
Figure Pinning SO14
Description
Symbol Function Output Output Output Ground Output Output Output Input Input Input Supply voltage, Input Input Input
U6805B
4763A-AUTO-11/03
U6805B
Basic Circuitry
integrated circuit U6805B requires stabilized supply voltage ±5%) comply with electrical characteristics. external buffer capacitor recommended. integrated diode between ground protects supply pin. input stages provided with integrated pull-up resistor directly connected microcontroller. output stages open collectors, each capable sinking Recommended external components: Pull-up resistor, Capacitor GND, Figure page
Functional Description
General
state: level input stage activates corresponding output stage. state: internal pull-up resistor provides high level input comparator deactivates output stage. Zener diodes between each input capable clamping current without crosstalk adjacent input stages. total clamping current should observed with respect power dissipation.
Current Limitation Output Stages Overtemperature Shutdown Transients Load Dump
temperature-dependent current limitation range protects stages case short-circuit. Additionally, chip temperature monitored. Tchip 148°C, outputs disabled automatically enabled with hysteresis DTChip Refer driver U6807B temperature shutdown feature required. integrated Zener diode protects each output stage against transients load dump (Schaffner pulses). With help external resistor, output transistor capable handling corresponding current which flows during each these conditions. Apart from that, outputs short-circuit overload protected. When supply voltage switched power-on reset pulse generated internally which disables output stages until defined supply-voltage level reached. low-voltage detection provided with hysteresis Vhyst typically.
Low-voltage Detection
4763A-AUTO-11/03
Figure Application Schematic
VBatt Load Microcontroller
U6805B
Absolute Maximum Ratings
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. This stress rating only functional operation device these other conditions beyond those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Parameters Supply voltage Ambient temperature range Storage temperature range Maximum junction temperature Symbol Tamb Tstg Value +125 +150 +150 Unit
Thermal Resistance
Parameters Junction ambient Symbol RthJA Value Unit
U6805B
4763A-AUTO-11/03
U6805B
Electrical Characteristics
Tamb 27°C, reference point (GND), unless otherwise specified, Figure page
Parameters Supply, Supply voltage Supply current Low-voltage detection threshold Low-voltage hysteresis Temperature shutdown Temperature shutdown hysteresis Inputs; Pins Z-diode protection voltage Z-diode clamping current Pull-up resistor Switching threshold Hysteresis Outputs; Pins Z-diode protection voltage Integrated capacitor Leakage current Saturation voltage Current limitation Propagation delay ILeak VSat Ilimit 26.5 Vhyst Inputs open Inputs switched VTH(ON) VTH(OFF) Vhyst TChip Thyst 4.75 0.55 5.25 1.05 Test Conditions Symbol Min. Typ. Max. Unit
4763A-AUTO-11/03
Ordering Information
Extended Type Number U6805B-FP Package SO14 Remarks
Package Information
Package SO14
Dimensions
8.75
1.27 7.62 0.25 0.10 6.15 5.85
technical drawings according specifications
U6805B
4763A-AUTO-11/03
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4763A-AUTO-11/03

Driver with Thermal Monitoring U6805B Description driver U68

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