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FR9618 / FR9618A SOP-8 LCD Power Management IC – Pack of 5
FR9618 / FR9618A SOP-8 LCD Power Management IC – Pack of 5
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FR9618 / FR9618A SOP-8 LCD Power Management IC — Display SMPS Controller (5-Pack)
The FR9618 and FR9618A are SOP-8 power management ICs specifically designed for LCD monitor and LCD TV power boards. They integrate a PWM controller for the display SMPS stage and backlight power sequencing, making them the standard replacement IC for failed power management sections in LCD monitor repair. The FR9618A is an improved version with enhanced protection features.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOP-8 (SMD) |
| Function | LCD power management / SMPS PWM controller |
| Application | LCD monitor and TV power board |
| Protection | OVP, OCP, soft-start, auto-restart |
| Quantity | 5 pieces |
FR9618 vs FR9618A
| Feature | FR9618 | FR9618A |
|---|---|---|
| Protection | Standard OVP/OCP | Enhanced OVP + improved OCP response |
| Soft-Start | Basic | Improved (reduced inrush) |
| Replacement | Original version | Drop-in upgrade for FR9618 |
Why Choose FR9618 / FR9618A?
- LCD-specific design — optimized for the power sequencing requirements of LCD monitor and TV panels
- FR9618A is a drop-in upgrade — pin-compatible with FR9618, improved protection reduces repeat failures
- SOP-8 package — direct replacement on existing LCD power board footprints
- Full protection suite — OVP/OCP/soft-start/auto-restart prevents damage under fault conditions
- 5-pack value — sufficient for multiple LCD repair jobs
Compatible With / Common Repair Applications
- LCD monitors: 17–24 inch LCD monitors with failed power management stage (Samsung, LG, Philips, AOC)
- LCD TV power boards: 32–42 inch LCD TV SMPS power board repair
- Monitor no-power fault: Common symptom when FR9618 fails — monitor powers on briefly then shuts off, or no power at all
- Backlight flicker repair: Unstable power management causing backlight instability
Frequently Asked Questions
Q: What symptoms indicate a failed FR9618 on an LCD monitor power board?
A: The most common symptoms are: (1) monitor powers on for 1–3 seconds then shuts off, (2) no power at all with correct input voltage present, (3) backlight flickers or fails to start. Always check electrolytic capacitors on the power board first — bulging or leaking caps are a more common cause than IC failure.
Q: Can I use FR9618A as a direct replacement for FR9618?
A: Yes — FR9618A is pin-compatible and electrically compatible with FR9618. It is the recommended upgrade as it has improved protection characteristics that reduce the likelihood of repeat failure.
Q: What other components should I replace when repairing an LCD power board?
A: When replacing FR9618/FR9618A, also inspect and replace: (1) all electrolytic capacitors on the primary and secondary side (common failure point), (2) the power MOSFET if shorted, (3) the optocoupler (PC817) in the feedback loop. Replacing only the IC without checking these often results in the new IC failing again.
Package Contents
- 5× FR9618 / FR9618A LCD Power Management IC (SOP-8) — variant as selected
