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STMicroelectronics PM6600TR
- Part No.:
- PM6600TR
- Manufacturer:
- STMicroelectronics
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
PM6600TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 24VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,620
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Product details
Overview
PM6600TR from STMicroelectronics is a monolithic 6-channel LED driver IC with integrated boost regulator, designed specifically for LCD panel backlighting in portable computing devices. It delivers up to 32 mA per channel across six independent current sinks, supports 36 V output voltage (enabling up to 10 white LEDs per row), and features ±2.1% current accuracy and ±2% inter-row matching. Its constant-frequency peak current-mode control enables stable operation with ceramic output capacitors.
For engineers reviewing the PM6600TR datasheet, PM6600TR pinout, PM6600TR application, or PM6600TR equivalent, key selection criteria include PWM dimming capability down to 1% duty cycle at 20 kHz, open/short LED fault detection per row, programmable soft-start, external synchronization support for multi-device timing alignment, and thermal shutdown protection.
Technical Context
The PM6600TR integrates two tightly coupled functional blocks: a high-efficiency boost converter (4.7–28 V input, up to 36 V output) using internal power MOSFET and constant-frequency peak current-mode control, and six precision current-sink generators with independent ROWx outputs. The boost section includes programmable OVP via OVSEL divider, slope compensation (SLOPE pin), and pulse-skip mode for light-load efficiency.
Each ROWx channel operates as a controlled current sink with externally adjustable full-scale current (via RILIM resistor), enabling precise brightness control via PWM on DIM pin. Fault management is handled through MODE pin configuration and open-drain FAULT output, supporting detection of open-circuit, short-circuit, and intermittent LED faults per row - critical for reliable backlight operation in notebook monitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.7 V to 28 V - supports wide-range DC input including single-cell Li-ion (4.7 V min) and 24 V industrial rails. |
| Boost Output Voltage | Up to 36 V - enables driving up to 10 white LEDs (VF ≈ 3.6 V) in series per row without external components. |
| LED Current Accuracy | ±2.1% - ensures consistent luminance across all rows under varying temperature and supply conditions. |
| Inter-Row Matching | ±2% - minimizes visible brightness variation between parallel LED strings in multi-row backlight arrays. |
| PWM Dimming Resolution | 1% minimum duty cycle at 20 kHz - provides smooth, flicker-free brightness control without audible noise. |
| Switching Frequency Range | 200 kHz to 1 MHz - allows optimization of efficiency vs. EMI trade-offs and compatibility with small external inductors. |
| Fault Detection | Per-row open/short LED detection - enables system-level error reporting and graceful degradation instead of complete backlight failure. |
Pinout & Package
PM6600TR is housed in a VFQFPN-24 (4 mm × 4 mm, exposed pad) thermally enhanced package optimized for high-current LED driver applications. The exposed thermal pad must be soldered to PCB ground plane for effective heat dissipation and stable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ROW1–ROW6 | Current-sink outputs | Each drives one LED string; configured as high-side referenced sinks tied to PGND, supporting up to 32 mA per channel. |
| VIN | Main power input | Supplies both boost stage and internal LDO; accepts 4.7–28 V with overvoltage protection up to 40 V absolute max. |
| LX | Switching node | Drain of internal power MOSFET; connects to boost inductor and flywheel diode; requires low-inductance layout. |
| PGND / SGND | Power / signal ground | Separate ground returns minimize noise coupling: PGND carries high pulsed currents; SGND serves analog/precision circuitry. |
| DIM | PWM brightness control | Accepts logic-level PWM signal (0–5 V); controls LED current amplitude without altering regulation loop stability. |
| FAULT | Open-drain fault indicator | Asserts low on any detected LED fault (open/short) or thermal shutdown; requires external pull-up for system monitoring. |
| EN | Enable control | Active-high enable; floating or high enables device with built-in soft-start; low disables all functions and reduces quiescent current to 30 µA. |
| RILIM / BILIM | Current limit programming | RILIM sets max ROW current (e.g., 51 kΩ = 32 mA); BILIM sets boost MOSFET current limit (e.g., 220 kΩ = 2 A peak). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +5 V LDO (LDO5) | Provides clean, regulated AVCC supply for internal analog circuitry - eliminates need for external bias rail. |
| Unused row detection | Automatically disables unconnected ROWx channels to prevent false fault triggers and reduce standby current. |
| External sync capability | Synchronization via SYNC output and FSW input enables phase-aligned operation of multiple PM6600TRs in large-panel designs. |
| Ceramic capacitor compatible | Stable with low-ESR ceramic output caps - reduces board area, improves reliability, and avoids electrolytic aging issues. |
| Programmable soft-start | SS pin capacitor sets ramp time to avoid inrush current - prevents input voltage droop during startup in battery-powered systems. |
Applications
| Notebook Monitor Backlight | UMPC Display Backlight |
|---|---|
|
Use Scenario: Driving edge-lit or direct-lit LED arrays behind 10–15.6-inch LCD panels in battery-powered notebooks. IC Role / Device Role / Timing Role: Primary backlight controller managing six independent LED strings with synchronized PWM dimming and fault reporting. Use Value: Enables uniform brightness, flicker-free dimming down to 1%, and automatic LED failure isolation - extending display lifetime and reducing field returns. |
Use Scenario: Powering compact, high-brightness LED backlights in ultra-mobile PCs with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Integrated boost + current sink eliminates discrete DC-DC and driver ICs, reducing component count and BOM cost. Use Value: VFQFPN-24 package and ceramic-capacitor compatibility minimize footprint and height - critical for thin UMPC form factors. |
| Industrial Panel PC Backlight | Medical Diagnostic Display Backlight |
|
Use Scenario: Providing robust, long-life backlighting for 12–19-inch industrial HMIs operating in extended temperature ranges (−40°C to +85°C). IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open/short detection and thermal shutdown - ensuring continuous operation in harsh environments. Use Value: ±2% inter-row matching and ±2.1% current accuracy maintain consistent color and luminance across display lifetime, meeting IEC 61000-4 immunity requirements. |
Use Scenario: Supporting high-reliability, low-noise backlighting in diagnostic imaging displays where visual fidelity and uptime are mission-critical. IC Role / Device Role / Timing Role: Precision current generator with <1% PWM dimming resolution - enabling calibrated grayscale rendering and DICOM-compliant luminance control. Use Value: Built-in fault reporting (FAULT pin) and unused-row detection allow real-time display health monitoring - essential for FDA-regulated medical equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED backlight driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MH/NOPB (TI) | Single-channel buck-boost LED driver; no integrated current sinks or multi-row control. | Requires external current-setting resistors and multiplexing for >1 row; lacks per-row fault detection. | Preferred when only one LED string is needed and board space permits discrete current regulation. |
| MAX16820ATP+ (Maxim) | 6-channel linear LED driver with integrated boost; no pulse-skip mode or external sync capability. | Lower efficiency at high VIN-to-VLED differentials; limited to ≤20 V output; no ceramic-capacitor stability guarantee. | Selected for ultra-low-noise applications where switching artifacts must be avoided, despite higher thermal load. |
Compared with LM3409MH/NOPB and MAX16820ATP+, the PM6600TR uniquely combines 6-channel current sinking, 36 V boost capability, per-row fault detection, and external synchronization - making it the only single-chip solution qualified for notebook-class backlight systems requiring reliability, efficiency, and compactness.
Availability
PM6600TR is available at Aetrix Electronics and suitable for notebook monitor backlight, UMPC display backlight, and industrial panel PC backlight applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for PM6600TR 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 specializing in power management, analog, and microcontroller solutions for automotive, industrial, and consumer markets.
The PM6600TR belongs to ST's LED backlight driver product line, engineered specifically for high-efficiency, fault-resilient LCD panel illumination in portable and embedded display systems.
FAQ
What is the maximum number of white LEDs supported per row?
The PM6600TR supports up to 10 white LEDs per row, based on its 36 V maximum boost output voltage and typical forward voltage of 3.6 V per white LED. This assumes nominal operating conditions and proper thermal design; actual count may vary slightly depending on LED VF tolerance and ambient temperature.
How does the MODE pin affect fault handling behavior?
The MODE pin selects between two fault management modes: when tied to AVCC, it enables open-circuit and short-circuit LED detection per row with automatic FAULT assertion; when grounded, it disables short-circuit detection but retains open-circuit reporting. This allows system designers to prioritize reliability versus false-trigger sensitivity.
Can the PM6600TR operate without an external inductor?
No - the PM6600TR requires an external boost inductor connected between LX and VIN. The internal power MOSFET and control loop depend on this inductor for energy transfer; omitting it prevents proper regulation and risks device damage. Inductor value is selected based on switching frequency and output current requirements per application note AN4029.
Is the SS (soft-start) capacitor value standardized or application-dependent?
The SS capacitor value is application-dependent and determines soft-start duration: a 10 nF capacitor yields ~2 ms ramp time, while 100 nF extends it to ~20 ms. Selection balances inrush current limitation against startup speed - critical in battery-powered systems where input capacitance is constrained and voltage droop must be avoided.
PM6600TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 4.7V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 32mA
- Frequency:
- 200kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VFQFPN (4x4)
PM6600TR FAQ
1.How can I place an order for PM6600TR through Aetrix?
Please submit a Request for Quotation (RFQ) for PM6600TR 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 PM6600TR reliable?
The price and inventory of PM6600TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM6600TR is usually 5 days.
3.What payment methods are accepted for PM6600TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM6600TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PM6600TR?
PM6600TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PM6600TR 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 PM6600TR?
For technical support, including PM6600TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM6600TR requirements.
6.How does Aetrix verify that PM6600TR is sourced from the original manufacturer or authorized distributors?
All PM6600TR 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 PM6600TR meets industry standards.
7.What is the process for return or replacement of PM6600TR?
All PM6600TR units undergo pre-shipment inspection (PSI). If there is an issue with PM6600TR, 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 PM6600TR part is unused and in its original packaging.
Return procedure for PM6600TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PM6600TR Tags
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BCR430UXTSA2
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BCR420UE6433HTMA1
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LYT1604D-TL
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CL2N8-G
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