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Microchip Technology MCP1662T-E/MNY
- Part No.:
- MCP1662T-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP1662T-E/MNY.pdf
- Description:
- IC LED DRV RGLTR PWM 200MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,043
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Product details
Overview
MCP1662T-E/MNY from Microchip Technology is a non-synchronous step-up DC-DC converter optimized for constant-current white LED driving, featuring a 36V/800 mΩ integrated N-channel switch, 500 kHz fixed-frequency PWM operation, 300 mV feedback reference, and 1.3A cycle-by-cycle peak input current limit. It delivers up to 200 mA LED current from 5.0V input driving four white LEDs, supports 2.4–5.5V input range, and enables battery-powered backlighting in portable LCD devices.
For engineers reviewing the MCP1662T-E/MNY datasheet, MCP1662T-E/MNY pinout, MCP1662T-E/MNY application, or MCP1662T-E/MNY equivalent, this page provides verified technical context, package-specific pin functions, real-world LED current capability vs. VIN, open-load protection behavior, and validated alternative options for portable lighting designs with alkaline, NiMH, or single-cell Li-ion sources.
Technical Context
The MCP1662T-E/MNY implements peak current-mode control with internal slope compensation, using VSENSE derived from the NMOS switch current to generate the PWM ramp. Its error amplifier compares VFB against a 300 mV bandgap reference to regulate LED current via external RSET, enabling low-power dissipation sensing.
It integrates UVLO (2.3V start / 1.85V stop), thermal shutdown at 150°C with 15°C hysteresis, open-load protection triggered at 50 mV VFB, and cycle-by-cycle overcurrent limiting at 1.3A. The device enters shutdown with 20 nA typical quiescent current when EN = GND, bypassing VIN to VOUT through the inductor and external diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports two/three-cell alkaline/NiMH and single-cell Li-ion batteries without external regulation. |
| Feedback Reference Voltage | 300 mV ±25 mV - sets LED current with minimal power loss in RSET (e.g., 30 mW at 100 mA). |
| Switching Frequency | 500 kHz ±75 kHz - enables compact magnetics (4.7–10 µH) and reduces EMI compared to lower-frequency boost converters. |
| Peak Switch Current Limit | 1.3A typical - protects internal 800 mΩ NMOS during startup, overload, or short-circuit conditions. |
| UVLO Thresholds | 2.3V rising / 1.85V falling - prevents operation with discharged batteries while avoiding false restarts due to transients. |
| Open Load Protection Threshold | 50 mV VFB - disables switching if LED string disconnects or VFB shorts to GND, preventing SW pin overvoltage. |
| Shutdown Quiescent Current | 20 nA typical - extends battery life in standby mode for portable medical or handheld devices. |
Pinout & Package
Package: 8-Lead 2x3 TDFN with exposed thermal pad (EP). Thermal resistance θJA = 52.5°C/W enables high-current operation in space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts 2.4–5.5V battery source; requires ≥4.7 µF ceramic decoupling close to pin. |
| EN | Enable control input | Logic-high (>85% VIN) enables switching; logic-low (<7.5% VIN) forces 20 nA shutdown mode. |
| VFB | Current-sense feedback node | Regulates voltage across RSET to 300 mV; drops to 50 mV to trigger OLP during LED open-circuit fault. |
| SW | Switch node | Connects to boost inductor; carries 1.3A peak current; must be routed with minimal loop area to reduce EMI. |
| PGND | Power ground return | High-current return path for NMOS switch; must be connected to SGND at single point on PCB. |
| SGND | Signal ground reference | Return for error amplifier and bandgap reference; separate from PGND to avoid noise coupling. |
| NC | No-connect terminal | Unbonded pin; must remain unconnected per datasheet Table 3-1 for 8-lead TDFN variant. |
| EP | Exposed thermal pad | Electrically isolated pad requiring solder connection to PCB ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 36V/800 mΩ NMOS switch | Eliminates external high-voltage MOSFET and associated gate drive circuitry in LED boost designs. |
| Internal compensation network | Reduces BOM count by removing external RC compensation components required for stability. |
| Open load protection (OLP) | Prevents destructive overvoltage at SW and output during LED disconnection or VFB-to-GND short. |
| 500 kHz fixed-frequency PWM | Enables use of small, low-profile inductors (4.7–10 µH) and simplifies EMI filtering versus variable-frequency solutions. |
| 20 nA shutdown quiescent current | Extends shelf life and runtime in battery-powered devices requiring long idle periods (e.g., medical flashlights). |
Applications
| Backlighting for Portable LCDs | Li-ion Powered LED Flashlights |
|---|---|
Use Scenario: Driving 4–8 white LEDs in handheld GPS units or portable DVD players powered by 3.3–4.2V Li-ion cells. IC Role / Device Role / Timing Role: Constant-current boost regulator maintaining stable LED brightness across battery discharge curve. Use Value: Delivers 100–125 mA LED current at 4.2V input with 92% efficiency, minimizing heat and extending runtime. |
Use Scenario: High-brightness illumination in compact flashlight designs using single-cell Li-ion or 3×AA alkaline batteries. IC Role / Device Role / Timing Role: Step-up current source enabling consistent lumen output despite declining battery voltage. Use Value: Supports up to 200 mA LED current at 5.0V input, allowing high-intensity modes without external current-setting ICs. |
| Camera Flash Modules | Medical Diagnostic Lighting |
Use Scenario: Short-duration, high-current LED pulsing in smartphone or digital camera flash circuits. IC Role / Device Role / Timing Role: Fast-starting boost controller synchronized to EN pin PWM dimming for precise flash intensity control. Use Value: Achieves 90% of target ILED within 100 µs of EN assertion, supporting sub-millisecond flash timing requirements. |
Use Scenario: Reliable, low-noise illumination in portable ultrasound or endoscope devices requiring stable current under varying loads. IC Role / Device Role / Timing Role: Protected LED driver with OLP and thermal shutdown ensuring fail-safe operation during extended use. Use Value: Maintains ±3% LED current regulation from –40°C to +125°C ambient, critical for calibrated diagnostic light output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61061DRVR | Higher 600 kHz switching frequency; 1.5A peak current limit; 2.7–5.5V input; 300 mV VFB. | Optimized for smaller inductors but lacks integrated OLP and has higher 100 nA shutdown current. | Preferred when board space is critical and external OLP can be implemented; not drop-in due to different pinout and EN threshold. |
| MAX1910EUT+T | 2.6–5.5V input; 300 mV VFB; 1.2A peak current; no integrated OLP; 1 µA shutdown current. | Requires external fault detection circuitry; lower efficiency (88%) at 100 mA due to higher RDS(on). | Valid for cost-sensitive designs where OLP is handled externally; incompatible pinout and thermal pad layout vs. MCP1662T-E/MNY. |
Compared with TPS61061DRVR and MAX1910EUT+T, the MCP1662T-E/MNY provides integrated open-load protection and lower 20 nA shutdown current-critical for battery longevity in portable medical and consumer lighting-while maintaining identical 300 mV feedback architecture for seamless RSET-based current scaling.
Availability
MCP1662T-E/MNY is available at Aetrix Electronics and suitable for portable LCD backlighting, Li-ion flashlight systems, and medical diagnostic lighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCP1662T-E/MNY includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for embedded, automotive, and industrial markets.
The MCP1662 product line delivers compact, high-efficiency LED drivers for battery-powered portable equipment, emphasizing low quiescent current, integrated protection, and simplified design with minimal external components.
FAQ
What is the maximum number of white LEDs the MCP1662T-E/MNY can drive in series?
The MCP1662T-E/MNY supports up to 10 white LEDs in series, limited by its 32V maximum output voltage and 36V switch rating. With typical white LED forward voltage of 3.1V at 100 mA, eight LEDs (24.8V) operate reliably at 4.2V input, delivering ~75 mA. Full 10-LED strings require careful thermal design and margin verification per Equation 5-2 in DS20005316E.
How does the MCP1662T-E/MNY implement open-load protection (OLP)?
The MCP1662T-E/MNY monitors the VFB pin voltage and disables switching when it falls below 50 mV - indicating either LED string disconnection or VFB shorted to GND. This prevents destructive overvoltage at the SW pin and output capacitor. OLP is disabled during startup and thermal shutdown to avoid false triggering, requiring external protection in PWM-dimming EN applications.
Can the MCP1662T-E/MNY operate from a single 1.5V alkaline cell?
No. The MCP1662T-E/MNY requires minimum 2.4V input and has UVLO start threshold of 2.3V typical, making it unsuitable for single 1.5V alkaline cells. It is designed for two-cell alkaline (3.0V nominal), three-cell NiMH (3.6V), or single-cell Li-ion (3.0–4.2V) sources. Operation below 2.4V violates datasheet specifications and risks unstable regulation.
What is the purpose of separate SGND and PGND pins on the MCP1662T-E/MNY?
SGND provides a low-noise reference return for the error amplifier and bandgap circuitry, while PGND handles high-current switching return paths for the internal NMOS switch. Separating these grounds minimizes noise coupling into the feedback loop. They must be connected to the same net at a single point on the PCB - typically near the input capacitor - to maintain signal integrity without creating ground loops.
Does the MCP1662T-E/MNY support analog dimming via the VFB pin?
No. The MCP1662T-E/MNY only supports PWM dimming via the EN pin. Its feedback architecture regulates VFB to a fixed 300 mV reference; injecting current or voltage into VFB disrupts regulation and may trigger OLP. Brightness control is achieved by applying a variable-duty-cycle PWM signal to EN, leveraging the device's 100 µs typical start-up time for linear current scaling.
MCP1662T-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.4V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 32V
- Current - Output / Channel:
- 200mA
- Frequency:
- 500kHz
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP1662T-E/MNY FAQ
1.How can I place an order for MCP1662T-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1662T-E/MNY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP1662T-E/MNY reliable?
The price and inventory of MCP1662T-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1662T-E/MNY is usually 5 days.
3.What payment methods are accepted for MCP1662T-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1662T-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1662T-E/MNY?
MCP1662T-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1662T-E/MNY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP1662T-E/MNY?
For technical support, including MCP1662T-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1662T-E/MNY requirements.
6.How does Aetrix verify that MCP1662T-E/MNY is sourced from the original manufacturer or authorized distributors?
All MCP1662T-E/MNY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP1662T-E/MNY meets industry standards.
7.What is the process for return or replacement of MCP1662T-E/MNY?
All MCP1662T-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with MCP1662T-E/MNY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP1662T-E/MNY part is unused and in its original packaging.
Return procedure for MCP1662T-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1662T-E/MNY Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
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