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Onsemi FAN7688SJX | Demoboard 6.6KW On Board EV Charger
Advanced Secondary Side LLC Resonant Converter Controller with Synchronous Rectifier Control
Overview
| Topology | LLC Resonant Converter |
| Input voltage | 90-264 V |
| Switching frequency | 36-735 kHz |
| Output 1 | 450 V / 16 A |
| IC revision | 0.9 |
Description
The FAN7688 is an advanced Pulse Frequency Modulated (PFM) controller for LLC resonant converters with Synchronous Rectification (SR) that offers best in class efficiency for isolated DC/DC converters. It employs a current mode control technique based on a charge control, where the triangular waveform from the oscillator is combined with the integrated switch current information to determine the switching frequency. This provides a better control-to-output transfer function of the power stage simplifying the feedback loop design while allowing true input power limit capability. Closed-loop soft-start prevents saturation of the error amplifier and allows monotonic rising of the output voltage regardless of load condition. A dual edge tracking adaptive dead time control minimizes the body diode conduction time thus maximizing efficiency.
Features
- Secondary Side PFM Controller for LLC Resonant Converter with Synchronous Rectifier Control
- Charge Current Control for Better Transient Response and Easy Feedback Loop Design
- Adaptive Synchronous Rectification Control with Dual Edge Tracking
- Closed Loop Soft-Start for Monotonic Rising Output
- Wide Operating Frequency (39 kHz ~ 690 kHz)
- Green Functions to Improve Light-Load Efficiency - Symmetric PWM Control at Light-Load to Limit the Switching Frequency while Reducing Switching Losses - Disabling SR at Light-Load Condition
- Protection Functions with Auto-Restart - Over-Current Protection (OCP) - Output Short Protection (OSP) - NON Zero-Voltage Switching Prevention (NZS) by Compensation Cutback (Frequency Shift) - Power Limit by Compensation Cutback (Frequency Shift) - Overload Protection (OLP) with Programmable Shutdown Delay Time - Over-Temperature Protection (OTP)
- Programmable Dead Times for Primary Side Switches and Secondary Side Synchronous Rectifiers
- VDD Under-Voltage Lockout (UVLO)
- Wide Operating Temperature Range -40°C to +125°C
Typical applications
- Game Console / LED TV / PDP TV / LCD TV
- Desktop PC / Fully Configured Entry Level PC Server
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | Q (%) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | L (µH) | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | VOP (V) | Mount | Pins (pcs) | Pitch (mm) | Rows | Gender | Type | IR (A) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012007051 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 10 pF | ±5% | 50 | 0805 | -55 °C up to +125 °C | 600 | – | 10 GΩ | NP0 Class I | 2 | 1.25 | 0.6 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012007057 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 100 pF | ±5% | 50 | 0805 | -55 °C up to +125 °C | 1000 | – | 10 GΩ | NP0 Class I | 2 | 1.25 | 0.6 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012007059 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 220 pF | ±5% | 50 | 0805 | -55 °C up to +125 °C | 1000 | – | 10 GΩ | NP0 Class I | 2 | 1.25 | 0.6 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012007061 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 470 pF | ±5% | 50 | 0805 | -55 °C up to +125 °C | 1000 | – | 10 GΩ | NP0 Class I | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207086 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 1 nF | ±10% | 50 | 0805 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207088 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 2.2 nF | ±10% | 50 | 0805 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207090 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 4.7 nF | ±10% | 50 | 0805 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207092 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 10 nF | ±10% | 50 | 0805 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207096 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 47 nF | ±10% | 50 | 0805 | -55 °C up to +125 °C | – | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207072 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 100 nF | ±10% | 25 | 0805 | -55 °C up to +125 °C | – | 3.5 | 5 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207074 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 220 nF | ±10% | 25 | 0805 | -55 °C up to +125 °C | – | 3.5 | 2.3 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207076 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 470 nF | ±10% | 25 | 0805 | -55 °C up to +125 °C | – | 3.5 | 1.1 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207052 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 16 V(DC) | 2.2 µF | ±10% | 16 | 0805 | -55 °C up to +125 °C | – | 10 | 0.05 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012207079 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 2.2 µF | ±10% | 25 | 0805 | -55 °C up to +125 °C | – | 10 | 0.05 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012208094 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | 4.7 µF | ±10% | 50 | 1206 | -55 °C up to +125 °C | – | 10 | 0.02 GΩ | X7R Class II | 3.2 | 1.6 | 1.6 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
| 885012208069 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 25 V(DC) | 10 µF | ±10% | 25 | 1206 | -55 °C up to +125 °C | – | 10 | 0.01 GΩ | X7R Class II | 3.2 | 1.6 | 1.6 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 74438343010 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-MAPI SMT Power Inductor | – | – | – | 2010 | -40 °C up to +125 °C | – | – | – | – | 2 | 1.6 | 1 | – | – | 1 | 2.8 | 4.7 | 86 | 99 | 80 | SMT | 2 | – | – | – | – | 1.8 | ||
 | 61300511021 | SPEC | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header - Single | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 12.7 | – | – | – | Bag | – | – | – | – | – | – | THT | 5 | 2.54 | Single | Pin Header | Angled | 3 | |
 | 61301011021 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header - Single | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 25.4 | – | – | – | Bag | – | – | – | – | – | – | THT | 10 | 2.54 | Single | Pin Header | Angled | 3 | |
 | 61300611021 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header - Single | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 15.24 | – | – | – | Bag | – | – | – | – | – | – | THT | 6 | 2.54 | Single | Pin Header | Angled | 3 | |
 | 61300811021 | SPEC | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header - Single | – | – | – | – | -40 °C up to +105 °C | – | – | 1000 MΩ | – | 20.32 | – | – | – | Bag | – | – | – | – | – | – | THT | 8 | 2.54 | Single | Pin Header | Angled | 3 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012007051 | SPEC | |
| 885012007057 | SPEC | |
| 885012007059 | SPEC | |
| 885012007061 | SPEC | |
| 885012207086 | SPEC | |
| 885012207088 | SPEC | |
| 885012207090 | SPEC | |
| 885012207092 | SPEC | |
| 885012207096 | SPEC | |
| 885012207072 | SPEC | |
| 885012207074 | SPEC | |
| 885012207076 | SPEC | |
| 885012207052 | SPEC | |
| 885012207079 | SPEC | |
| 885012208094 | SPEC | |
| 885012208069 | SPEC | |
| 74438343010 | SPEC | |
| 61300511021 | SPEC | – |
| 61301011021 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | – |
| 61300611021 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | – |
| 61300811021 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | VR (V (DC)) | Size | Operating Temperature | Q (%) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | L (µH) | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | VOP (V) | Mount | Pins (pcs) | Pitch (mm) | Rows | Gender | Type | IR (A) | Samples |
|---|
