DEMOBOARD TLE 6389-2GV
DEMOBOARD TLE 6389-2GV Datasheet
To meet the strict requirements in terms of current consumption demanded by all Bodyand 42V PowerNet applications a special PFM Pulse Frequency Modulation - PWM Pulse Width Modulation control scheme for highest efficiency is implemented in the TLE 6389 regulators. Under light load conditions the output voltage is able to increase slightly and at a certain threshold the controller jumps into PFM mode. In this PFM operation the PMOS is triggered with a certain on time depending on input voltage, output voltage, inductance- and sense resistor value whenever the buck output voltage decreases to the so called WAKE-threshold. The switching frequency of the step down regulator is determined in the PFM mode by the load current. It increases with increasing load current and turns finally to the fixed PWM frequency at a certain load current depending on the input voltage, current sense resistor and inductance. The diagram below shows the buck regulation circuit of the TLE 6389
| Part | Datasheet |
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DEMOBOARD TLE 6389-2GV |
DEMOBOARD TLE 6389-2GV (pdf) |
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TLE63893GV50XUMA1 |
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TLE63892GV50XUMA1 |
TLE63892GV50XUMA1 |
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| Step-Down DC/DC Controller TLE 6389 Overview • Input voltage range from < 5V up to 60V • Output voltage 5V fixed or adjustable 7V to 15V • Output voltage accuracy 3% • Output current up to 2.3A • 100% maximum duty cycle • Less than 120µA quiescent current at low loads1 • 2µA max. shutdown current at device off TLE 6389-2 GV • Fixed 360kHz switching frequency • Frequency synchronization input for external clocks • Current Mode control scheme • Integrated output under voltage Reset circuit • On chip low battery detector on chip comparator • Automotive temperature range -40°C to 150 °C • Green Product RoHS compliant • AEC qualified 1 dependend on external components P DSO 14 3 8 9 11 1 RSENSE= L1 = 47 µH V OUT IOUT CIN1= 100 µF CBDS= 220 nF COUT = 100 µF RSI1= RSI2= CIN2 = 220nF 13 BDS VS GDRV FB VOUT TLE6389-3 GV50 COMP SI_GND SI_ENABLE SYNC GND RO 2.2nF ON OFF M1 Infineon BSO613SPV Infineon BSP613P D1 Motorola MBRD360 L1 EPCOS B82479-A1473-M Coilcraft DO3340P-473 CIN1 Electrolythic CIN2 Ceramic COUT Low ESR Tantalum Type TLE 6389-2 GV TLE 6389-2 GV50 TLE 6389-3 GV50 Package PG-DSO-14-1 PG-DSO-14-1 PG-DSO-14-1 Description adjustable 5V, RO-Hysteresis << 5V, RO-Hysteresis 1V 2007-08-13 TLE 6389 Short functional description The TLE 6389 step-down DC-DC switching controllers provide high efficiency over loads ranging from 1mA up to 2.5A. A unique PWM/PFM control scheme operates with up to a 100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates minimum load requirements and reduces the supply current under light loads to 120µA, depending on dimensioning of external components. In addition the adjustable version TLE6389-2 GV can be shut down via the Enable input reducing the input current to <2µA. The TLE 6389 step-down controllers drive an external P-channel MOSFET, allowing design flexibility for applications up to 12.5W of output power. A high switching frequency and operation in continuous-conduction mode allow the use of tiny surfacemount inductors. Output capacitor requirements are also reduced, minimizing PC board area and system costs. The output voltage is preset at 5V TLE6389-2 GV50 and TLE6389-3 GV50 and adjustable for the TLE6389-2 GV. The version TLE6389-2 GV50 features a reset function with a threshold between 4.5V and 4.8V, including a small hysteresis of typ. 50mV. In the version TLE6389-3 GV50 the device incorporates a reset with a typ. 1V hysteresis. Input voltages of all TLE 6389 can be up to 60V. Pin Configuration top view ENABLE / SI_ENABLE VOUT 3 GND 4 SYNC 5 |
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