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STMicroelectronics STLD20CP1PQR
- Part No.:
- STLD20CP1PQR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
STLD20CP1PQR.pdf
- Description:
- IC LED DRV RGLTR PWM 300MA 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,843
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Product details
Overview
STLD20CP1PQR from STMicroelectronics is a dual-mode white LED power management IC integrating a 1.3 MHz PWM step-up converter (up to 17 V) and a 2X/1X charge pump, designed for TFT backlighting (2–4 series WLEDs) and camera flash/torch (up to 300 mA flash, 130 mA torch). It features single-wire pulse dimming, external current-setting resistors (IT/IF), logic-selectable flash/torch mode (SEL/TF), and operates from 2.8 V to 6 V input across –40 °C to 85 °C.
For engineers reviewing the STLD20CP1PQR datasheet, STLD20CP1PQR pinout, STLD20CP1PQR application, or STLD20CP1PQR equivalent, key selection criteria include step-up OVP (16.5 V), charge pump current accuracy (±10%), thermal shutdown (180 °C), QFN16 (3×3 mm) footprint compatibility, and digital control timing (e.g., TSHDN = 500 µs).
Technical Context
The device implements two independent power paths: a discontinuous-conduction-mode boost regulator with current-mode feedback (VFB_SU = 490 mV typ.) for backlight LEDs, and a soft-start-enabled switched-capacitor charge pump (VFB_CP = 150 mV) that auto-switches between 1X and 2X modes based on output load and input voltage. Both paths share logic-controlled enable/shutdown (TF, SEL, DM1/DM2) and thermal/overvoltage protection.
Backlight brightness is controlled via three methods: discrete digital dimming (truth-table modes: 0%, 5%, 60%, 100%), PWM dimming (up to 50 kHz, 5–100% duty cycle), or single-wire pulse dimming (10-step 10% decrements). Flash current is set by resistor-to-IT/IF ratio (K ≈ 1220), with torch mode limited to 130 mA and flash mode to 300 mA at VIN ≥ 3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 6 V - supports single-cell Li-ion and Li-poly battery operation without pre-regulation. |
| Step-up Output Voltage | Up to 17 V - sufficient to drive 4-series white LEDs (VF ≈ 3.2 V each) with margin for OVP threshold (16.5 V). |
| Charge Pump Modes | 2X and 1X - automatically selects mode based on VFB_CP vs. 150 mV to maintain regulation under varying VIN and load. |
| Flash Current Accuracy | ±10% - ensures consistent camera flash intensity across temperature and supply variation (VI = 3.0–4.2 V). |
| Switching Frequency | 1.3 MHz - enables use of small 3.3 µH inductor and compact 2.2 µF ceramic output capacitors. |
| Thermal Shutdown | 180 °C with 20 °C hysteresis - prevents permanent damage during sustained high-current flash operation. |
| Standby Current | 1 µA - minimizes battery drain in shutdown state (all digital inputs low). |
Pinout & Package
STLD20CP1PQR is housed in a thermally enhanced, lead-free QFN16 package (3 mm × 3 mm, 0.9 mm height) with exposed thermal pad (EP) connected to PGND for efficient heat dissipation in space-constrained mobile applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power supply input | Accepts 2.8–6 V battery input; feeds both boost and charge pump sections. |
| SW | Boost switch node | Connects to external inductor; internal N-channel MOSFET drain node (RDSON = 0.8 Ω). |
| OUT_SU | Boost output | Drives anode of series-connected WLED string; monitored for overvoltage protection (OVP = 16.5 V). |
| FB_SU | Boost feedback | Senses LED current via external RLED; regulates ILED = VFB_SU / RLED (VFB_SU = 490 mV typ.). |
| TF | Charge pump enable | Active-high logic input; must be high with SEL to activate flash or torch mode. |
| SEL | Mode select | High = flash mode (300 mA), Low = torch mode (130 mA); determines which current-setting resistor (IF or IT) is active. |
| IT | Torch current sense | Resistor from IT to IN sets torch current: ITORCH ≈ 1220 × 0.6 / RTH (RTH = 7.8 kΩ → 100 mA). |
| IF | Flash current sense | Resistor from IF to IN sets flash current: IFLASH ≈ 1220 × 0.6 / RFL (RFL = 1.95 kΩ → 300 mA). |
| DM1 / DM2 | Dimming & shutdown control | Two-pin interface supporting truth-table dimming (0%/5%/60%/100%), PWM dimming, or single-wire pulse dimming. |
| PGND / SGND | Power & signal ground | Separate ground pins minimize noise coupling between high-current boost path and sensitive analog feedback. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path architecture | Independent boost (backlight) and charge pump (flash) circuits eliminate cross-regulation and enable simultaneous operation. |
| Single-wire pulse dimming | Reduces PCB routing by tying DM1/DM2 together; 10 discrete brightness steps (100% → 5%) via microcontroller pulse train. |
| Auto-switching charge pump | Seamlessly transitions between 1X and 2X modes based on VFB_CP, maintaining LED regulation without external mode control. |
| Soft-start & peak current limit | Integrated IPK = 1.2 A limit acts as inherent soft-start, preventing inrush current damage to inductor and input capacitor. |
| Comprehensive protection | Includes overvoltage (16.5 V step-up, 6 V charge pump), overtemperature (180 °C), and short-circuit detection with automatic shutdown. |
Applications
| Mobile Phone Backlight | Smartphone Camera Flash |
|---|---|
|
Use Scenario: Driving 3-series white LEDs for main/sub-display TFT backlight in slim smartphones. IC Role / Device Role / Timing Role: Step-up converter provides regulated 12–15 V output; FB_SU feedback loop maintains constant LED current despite battery voltage sag. Use Value: 80% efficiency at 20 mA enables >5 hours of continuous display use on 1000 mAh battery; QFN16 footprint saves board area. |
Use Scenario: Delivering high-intensity, repeatable flash pulses for smartphone camera modules. IC Role / Device Role / Timing Role: Charge pump delivers up to 300 mA at 4 V into power LED; TF/SEL logic enables precise flash duration control per shot. Use Value: ±10% flash current accuracy ensures consistent image exposure; thermal shutdown prevents overheating during burst capture. |
| Portable Media Player Display | Tablet Torch Mode |
|
Use Scenario: Powering 4-series WLEDs for high-brightness video playback on 4–7 inch LCD panels. IC Role / Device Role / Timing Role: 17 V step-up capability supports full brightness even at end-of-discharge battery voltage (2.8 V). Use Value: Discontinuous-mode operation ensures stable regulation at low loads; single-wire dimming simplifies MCU GPIO usage. |
Use Scenario: Providing steady 100 mA torch illumination for low-light UI navigation in tablets. IC Role / Device Role / Timing Role: Charge pump operates in 1X mode (VIN → VOUT) when battery voltage exceeds LED forward voltage, minimizing power loss. Use Value: 130 mA max torch current extends runtime vs. flash mode; standby current of 1 µA preserves battery during idle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3648 | Single-path buck-boost architecture; no dedicated step-up + charge pump dual path; uses I²C interface instead of logic pins. | Lacks discrete torch/flash mode separation; requires host processor for all dimming and mode control. | Preferred when system already uses I²C bus and needs programmable ramp rates or fault reporting. |
| TPS61310 | Boost-only topology (no integrated charge pump); max output 28 V but no flash-specific current regulation or SEL/TF logic. | Requires external flash driver circuitry; cannot directly replace STLD20CP1PQR's dual-function capability. | Only suitable if flash functionality is implemented separately and only backlight regulation is needed. |
Compared with LM3648 and TPS61310, STLD20CP1PQR uniquely integrates independent, logic-controlled boost and charge pump rails in one QFN16 package-enabling true hardware-based flash/torch mode switching and eliminating MCU firmware overhead for basic lighting control.
Availability
STLD20CP1PQR is available at Aetrix Electronics and suitable for mobile phone backlighting, smartphone camera flash systems, portable media player displays, and tablet torch illumination requiring stable component supply and legacy design continuity.
Supply support for STLD20CP1PQR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, microcontrollers, sensors, and automotive ICs.
The STLD20CP1 belongs to ST's LED lighting power management product line, engineered specifically for space- and efficiency-constrained handheld devices requiring simultaneous high-brightness backlight and high-current flash capability.
FAQ
What is the recommended inductor value and type for the step-up converter?
The datasheet specifies a 3.3 µH shielded power inductor with saturation current ≥1.2 A and DC resistance <100 mΩ. Recommended part types include Coilcraft MSS5131-332ML or Murata LQH3NPN3R3MJ0L. Using non-shielded or undersized inductors causes EMI issues and reduces efficiency below 80% due to core saturation.
How does the charge pump determine when to switch between 1X and 2X modes?
The charge pump monitors VFB_CP against a 150 mV threshold. If VFB_CP falls below 150 mV under load, the device switches to 2X mode to raise VOUT_CP above VIN; once VFB_CP reaches regulation, it remains in 2X until VIN rises ~50 mV above VOUT_CP, then reverts to 1X. This is fully autonomous and requires no external control.
Can DM1 and DM2 be used simultaneously for PWM dimming and shutdown?
Yes - DM1 and DM2 serve dual roles: logic inputs for discrete dimming/shutdown (per truth table), and PWM inputs for analog-like brightness control. For example, holding DM2 high while applying PWM to DM1 achieves 0–60% dimming; pulling both low shuts down the step-up converter entirely with 1 µA standby current.
Is STLD20CP1PQR still in active production or marked obsolete?
Per ST's official documentation (Rev 2, Nov 2007), STLD20CP1PQR is marked "Obsolete Product(s)" on st.com. However, Aetrix Electronics maintains legacy inventory with full traceability and offers engineering support for continued use in maintenance, repair, and legacy production programs where redesign is not feasible.
STLD20CP1PQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost), Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 2.8V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 300mA (Flash)
- Frequency:
- 1.3MHz
- Dimming:
- PWM, Single-Wire
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
STLD20CP1PQR FAQ
1.How can I place an order for STLD20CP1PQR through Aetrix?
Please submit a Request for Quotation (RFQ) for STLD20CP1PQR 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 STLD20CP1PQR reliable?
The price and inventory of STLD20CP1PQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STLD20CP1PQR is usually 5 days.
3.What payment methods are accepted for STLD20CP1PQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STLD20CP1PQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STLD20CP1PQR?
STLD20CP1PQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STLD20CP1PQR 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 STLD20CP1PQR?
For technical support, including STLD20CP1PQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STLD20CP1PQR requirements.
6.How does Aetrix verify that STLD20CP1PQR is sourced from the original manufacturer or authorized distributors?
All STLD20CP1PQR 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 STLD20CP1PQR meets industry standards.
7.What is the process for return or replacement of STLD20CP1PQR?
All STLD20CP1PQR units undergo pre-shipment inspection (PSI). If there is an issue with STLD20CP1PQR, 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 STLD20CP1PQR part is unused and in its original packaging.
Return procedure for STLD20CP1PQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STLD20CP1PQR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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