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BP1808 / BP2832A / BP2831A LED Backlight Driver IC — SOP-8, Boost, PWM Dimming (5-Pack)
BP1808 / BP2832A / BP2831A LED Backlight Driver IC SOP-8, Boost, PWM Dimming (5-Pack)
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BP1808 / BP2832A / BP2831A LED Backlight Driver IC — SOP-8, Boost, PWM Dimming (5-Pack)
The BP1808, BP2832A, and BP2831A are SOP-8 boost-topology LED backlight driver ICs widely used in LCD monitor, laptop, and LED TV power board repair. They integrate a current-mode PWM boost controller with constant-current LED string output, PWM dimming input, and full protection (OVP, OCP, thermal shutdown, open/short LED detection) in a single compact package.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOP-8 (SMD) |
| Topology | Boost converter, current-mode PWM |
| Dimming | PWM input (100Hz–1kHz) |
| Switching Frequency | ~200kHz typical |
| Protection | OVP, OCP, thermal shutdown, open/short LED |
| Output | Constant-current LED string |
| Quantity | 5 pieces |
Variant Comparison
| Part Number | Key Feature | Best For |
|---|---|---|
| BP1808 | Standard boost LED driver | General LCD backlight repair |
| BP2832A | Enhanced OVP, wider input range | 19–27" LCD monitor repair (most common) |
| BP2831A | Lower quiescent current | Energy-efficient LED driver designs |
Why Choose BP1808 / BP2832A / BP2831A?
- Integrated boost + constant-current driver — no external PWM controller needed, minimal BOM
- PWM dimming input — directly compatible with LCD controller board dimming signals
- Full protection suite — OVP/OCP/thermal/open-LED prevents cascade failure during repair
- SOP-8 footprint — direct drop-in replacement on existing LCD power board layouts
- 5-pack value — sufficient for multiple LCD repair jobs and prototyping
Compatible With / Common Repair Applications
- LCD monitors: 19–27 inch LED-backlit panels (Samsung, LG, AOC, Dell power boards)
- Laptop LCD backlight: Replacement for failed backlight driver on laptop inverter boards
- LED TV power board: Backlight boost stage repair (32–42 inch panels)
- DIY LED driver PCB: Constant-current LED string driver for custom lighting projects
- Programmer/tester tools: CH341A for reading original IC markings before replacement
Frequently Asked Questions
Q: How do I identify which variant (BP1808, BP2832A, or BP2831A) is on my LCD board?
A: Read the markings on the original failed IC under magnification. BP2832A is the most common in 19–27" LCD monitors and is the recommended replacement for BP1808 in most repair scenarios. Always verify pinout against the datasheet before substituting.
Q: What causes LED backlight driver ICs to fail in LCD monitors?
A: The most common cause is an open-circuit LED string — when one LED in the string fails open, OVP triggers repeatedly, stressing the driver IC until it fails. Always test all LED strings for continuity before replacing the driver IC, or the new IC will fail again.
Q: Can I use BP2832A for a new LED driver design (not repair)?
A: Yes. The reference circuit requires an external boost inductor (typically 47–100μH), output capacitor, current-sense resistor (sets LED current), and feedback resistor divider. The PWM dimming pin accepts a 100Hz–1kHz signal from an MCU GPIO for brightness control.
Package Contents
- 5× BP1808 / BP2832A / BP2831A LED Backlight Driver IC (SOP-8) — variant as selected
- ★Product Description
- ★About us
- ★Custom cable
BP1808 / BP2832A / BP2831A LED Backlight Driver IC — SOP-8, Boost, PWM Dimming (5-Pack)
The BP1808, BP2832A, and BP2831A are SOP-8 boost-topology LED backlight driver ICs widely used in LCD monitor, laptop, and LED TV power board repair. They integrate a current-mode PWM boost controller with constant-current LED string output, PWM dimming input, and full protection (OVP, OCP, thermal shutdown, open/short LED detection) in a single compact package.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOP-8 (SMD) |
| Topology | Boost converter, current-mode PWM |
| Dimming | PWM input (100Hz–1kHz) |
| Switching Frequency | ~200kHz typical |
| Protection | OVP, OCP, thermal shutdown, open/short LED |
| Output | Constant-current LED string |
| Quantity | 5 pieces |
Variant Comparison
| Part Number | Key Feature | Best For |
|---|---|---|
| BP1808 | Standard boost LED driver | General LCD backlight repair |
| BP2832A | Enhanced OVP, wider input range | 19–27" LCD monitor repair (most common) |
| BP2831A | Lower quiescent current | Energy-efficient LED driver designs |
Why Choose BP1808 / BP2832A / BP2831A?
- Integrated boost + constant-current driver — no external PWM controller needed, minimal BOM
- PWM dimming input — directly compatible with LCD controller board dimming signals
- Full protection suite — OVP/OCP/thermal/open-LED prevents cascade failure during repair
- SOP-8 footprint — direct drop-in replacement on existing LCD power board layouts
- 5-pack value — sufficient for multiple LCD repair jobs and prototyping
Compatible With / Common Repair Applications
- LCD monitors: 19–27 inch LED-backlit panels (Samsung, LG, AOC, Dell power boards)
- Laptop LCD backlight: Replacement for failed backlight driver on laptop inverter boards
- LED TV power board: Backlight boost stage repair (32–42 inch panels)
- DIY LED driver PCB: Constant-current LED string driver for custom lighting projects
- Programmer/tester tools: CH341A for reading original IC markings before replacement
Frequently Asked Questions
Q: How do I identify which variant (BP1808, BP2832A, or BP2831A) is on my LCD board?
A: Read the markings on the original failed IC under magnification. BP2832A is the most common in 19–27" LCD monitors and is the recommended replacement for BP1808 in most repair scenarios. Always verify pinout against the datasheet before substituting.
Q: What causes LED backlight driver ICs to fail in LCD monitors?
A: The most common cause is an open-circuit LED string — when one LED in the string fails open, OVP triggers repeatedly, stressing the driver IC until it fails. Always test all LED strings for continuity before replacing the driver IC, or the new IC will fail again.
Q: Can I use BP2832A for a new LED driver design (not repair)?
A: Yes. The reference circuit requires an external boost inductor (typically 47–100μH), output capacitor, current-sense resistor (sets LED current), and feedback resistor divider. The PWM dimming pin accepts a 100Hz–1kHz signal from an MCU GPIO for brightness control.
Package Contents
- 5× BP1808 / BP2832A / BP2831A LED Backlight Driver IC (SOP-8) — variant as selected
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