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Technical Specifications
Parameters and characteristics for this part
| Specification | L6699DTR |
|---|---|
| Control Features | Soft Start |
| Duty Cycle | 50 % |
| Fault Protection | Current Limiting |
| Frequency - Switching [Max] | 235 kHz |
| Frequency - Switching [Min] | 60 kHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Isolation | Isolated |
| Package / Case | 16-SOIC |
| Package / Case | 0.154 in, 3.9 mm |
| Supplier Device Package | 16-SO |
| Topology | Half-Bridge |
| Voltage - Start Up | 10.7 V |
| Voltage - Supply (Vcc/Vdd) [Max] | 16 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 8.85 V |
Pricing
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Description
General part information
L6699 Series
The L6699 is a double-ended controller specific to series-resonant half bridge topology. Both LLC and LCC configurations are supported. It provides symmetrical complementary duty cycle: the high-side switch and the low-side switch are driven ON/OFF 180° out-of-phase for exactly the same time. Output voltage regulation is obtained by modulating the operating frequency. The deadtime inserted between the turn-off of one switch and the turn-on of the other one is automatically adjusted to best fit the transition times of the half bridge midpoint. To drive the high-side switch with the bootstrap approach, the IC incorporates a high voltage floating structure able to withstand more than 600 V with a synchronous-driven high voltage DMOS that replaces the external fast-recovery bootstrap diode.
The IC enables the user to set the operating frequency range of the converter by means of a high-accuracy externally programmable oscillator.
At startup, in addition to the traditional frequency-shift soft-start (the switching frequency starts from a preset maximum value and then decays as far as the steady-state value determined by the control loop), a proprietary circuit controls the half bridge to prevent hard-switching from occurring in the initial cycles because of the unbalance in the V·s applied to the transformer.
Documents
Technical documentation and resources