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Analog Devices Inc. LTC3207EUF#TRPBF
- Part No.:
- LTC3207EUF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LTC3207EUF#TRPBF.pdf
- Description:
- IC LED DRV RGLTR ANALOG 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,905
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Product details
Overview
LTC3207EUF#TRPBF from Analog Devices (formerly Linear Technology) is a highly integrated multi-output LED/CAM driver IC featuring a low-noise, multi-mode charge pump (1x/1.5x/2x), twelve 27.5mA universal current sources with 64-step linear brightness control, and one 425mA camera LED current source with 16-step control and 2-second safety timer. It operates from 2.9V to 5.5V VBAT and supports I²C-controlled independent on/off, blinking, and gradation for all outputs - used in QVGA+ video phones with MAIN/SUB/RGB/CAM displays.
For engineers reviewing the LTC3207EUF#TRPBF datasheet, LTC3207EUF#TRPBF pinout, LTC3207EUF#TRPBF application, or LTC3207EUF#TRPBF equivalent, key selection considerations include its 24-pin 4mm × 4mm QFN package, dual I²C addresses (00110110 vs 00110100), ENU/CAMHL asynchronous control pins, automatic mode switching based on dropout detection, and guaranteed operation from –40°C to +85°C.
Technical Context
The LTC3207EUF#TRPBF implements a 850kHz fixed-frequency, non-overlapping switched-capacitor charge pump with three operating modes: direct pass-through (1x), 1.5× boost, and 2× boost - dynamically selected based on real-time dropout detection at any enabled ULED or CAM output. Mode transitions require ~400µs confirmation delay to accommodate LED forward-voltage settling.
Each of the twelve ULED outputs integrates a 6-bit linear DAC (0–27.5mA, 64 steps, ±2% matching), while the CAM output uses a 4-bit DAC (0–425mA, 16 steps) with separate high/low registers selectable via CAMHL pin or I²C. All current sources feature <180mV dropout voltage at full scale and support slew-limited switching to minimize conducted/radiated EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBAT Range | 2.9V to 5.5V - supports single-cell Li-ion and Li-poly battery input without external regulation. |
| Total Output Current | Up to 600mA pulsed (10% duty cycle) - enables simultaneous MAIN (4-LED), SUB (2-LED), RGB (dual), and CAM lighting. |
| Charge Pump Modes | 1x / 1.5x / 2x - auto-switching based on dropout; resets to 1x on I²C register update, CAMHL fall, or gradation completion. |
| ULED Current Accuracy | ±2% matching between any two outputs at 50% full scale - ensures uniform brightness across multi-LED displays. |
| CAM Safety Timer | 2.1s high-current timeout - disables CAM output after 2 seconds in high-current mode to prevent thermal overstress. |
| I²C Interface | Standard-mode (400kHz max), two slave addresses (00110110 for LTC3207; 00110100 for LTC3207-1) - allows co-location of both variants on same bus. |
| Package | 24-pin 4mm × 4mm QFN with exposed pad - provides low thermal resistance (θJA = 40°C/W) and compact footprint for space-constrained mobile designs. |
Pinout & Package
Package: 24-lead (4mm × 4mm) plastic QFN with exposed thermal pad (Pin 25 = GND, must be soldered to PCB ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CPO (1) | Charge pump output | Supplies regulated voltage (up to 5.05V) to all LED anodes; requires 4.7µF ceramic capacitor to GND. |
| ULED1–ULED12 (2–6,12–18) | Universal LED current sinks | Twelve 27.5mA current sources with 6-bit DAC control; configurable as open-drain GPOs via register programming. |
| CAM (7) | Camera LED current sink | 425mA current source with 4-bit DAC and dual-register high/low selection via CAMHL pin or I²C. |
| CAMHL (8) | Camera register select | Logic-high selects CAM high-current register; falling edge forces charge pump reset to 1x mode. |
| DVCC (9) | Digital supply reference | Sets logic threshold for SCL/SDA/ENU/CAMHL; UVLO at 1V; requires 0.1µF bypass capacitor. |
| SCL/SDA (10/11) | I²C interface | Standard 2-wire serial bus; supports up to 400kHz clock; pull-ups required externally. |
| C1P/C1M/C2P/C2M (19–24) | Flying capacitor connections | Interface internal charge pump switches; require 2.2µF X5R/X7R ceramic capacitors per pair. |
| VBAT (21) | Main power input | Primary supply for charge pump and analog circuitry; requires 2.2µF low-ESR ceramic bypass. |
| ENU (22) | Asynchronous enable | Toggles preselected ULED outputs without I²C access; falling edge resets charge pump to 1x if active outputs exist. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-mode charge pump | Automatically selects 1x/1.5x/2x based on real-time LED dropout - maximizes efficiency while guaranteeing compliance across varying VF and temperature. |
| Slew-limited switching | 5–10ns edge rates on flying capacitor pins - reduces EMI by limiting di/dt and enabling cleaner EMC performance in RF-sensitive handheld devices. |
| Independent gradation control | Three ramp times (0.24s/0.48s/0.96s) per ULED output - enables smooth UI transitions without MCU intervention or additional timing hardware. |
| Configurable ENU pin | Hardware-triggered enable/disable of preprogrammed ULED sets - allows wake-up lighting (e.g., incoming call) without waking host processor or reinitializing I²C. |
| Short-circuit & thermal protection | Internal fault detection shuts down affected current sources and limits junction temperature - prevents damage during LED short or PCB trace failure. |
Applications
| Video Phone Display Backlight | Mobile Camera Flash Control |
|---|---|
Use Scenario: Driving MAIN (4-LED), SUB (2-LED), and dual RGB LEDs in QVGA+ video phone displays requiring uniform brightness and dynamic dimming. IC Role / Device Role / Timing Role: Multi-channel constant-current LED driver with I²C-configurable gradation and blinking - replaces discrete LED drivers and PWM controllers. Use Value: Eliminates need for external boost converters and multiple current-setting resistors; achieves <2% current matching across 12 channels for consistent color and luminance. | Use Scenario: Controlling white LED flash for mobile camera modules with precise high-current pulse timing and thermal safety. IC Role / Device Role / Timing Role: Dedicated 425mA camera current source with 2-second hardware safety timer and CAMHL-selectable high/low registers - enables instant flash activation without I²C latency. Use Value: Delivers reliable flash illumination while preventing thermal runaway; CAMHL pin allows microsecond-level register switching for burst capture sequences. |
| Smartphone Status Indicator Array | Portable Medical Imaging Device UI |
Use Scenario: Powering multi-color status indicators (RGB + white) on smartphone front bezels with independent blink patterns and fade effects. IC Role / Device Role / Timing Role: Universal current source array with per-channel 6-bit DACs and programmable blink/gradation - serves as centralized lighting engine for system-level UI feedback. Use Value: Reduces BOM count by consolidating 12 independent LED drivers into one IC; supports synchronized visual cues (e.g., charging + notification + proximity) via single I²C bus. | Use Scenario: Illuminating high-reliability UI elements (e.g., touch-sensitive overlays, diagnostic LEDs) in portable ultrasound or patient monitor devices. IC Role / Device Role / Timing Role: Precision current-regulated LED driver with shutdown current <7µA and –40°C to +85°C operation - meets industrial-grade power and environmental requirements. Use Value: Ensures long-term display stability under thermal cycling; low shutdown current extends battery life in always-on medical equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-output LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1698ETL+ | Single 400mA boost LED driver with analog/digital dimming; no multi-channel ULED array or CAM-specific features. | Targeted at automotive display backlighting only; lacks I²C address flexibility, gradation, or ENU pin. | Select when only one high-current LED string is needed and automotive AEC-Q100 qualification is required. |
| TPS61165DRVR | Single-output 400mA white LED driver with I²C interface; no universal current sources, no CAM timer, no multi-mode charge pump. | Designed for notebook/display backlighting; supports only one LED string with PWM/analog dimming - not suitable for multi-display or camera flash. | Select for cost-sensitive single-string applications where compact size and high efficiency (>90%) are primary goals. |
Compared with MAX1698ETL+ and TPS61165DRVR, the LTC3207EUF#TRPBF uniquely integrates twelve independently controllable ULED channels plus a dedicated CAM driver with safety timer and asynchronous ENU control - making it irreplaceable for complex mobile UI lighting architectures requiring coordinated multi-display and flash functionality.
Availability
LTC3207EUF#TRPBF is available at Aetrix Electronics and suitable for video phone backlighting, mobile camera flash control, smartphone status indicator arrays, and portable medical imaging device UIs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC3207EUF#TRPBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC3207EUF#TRPBF belongs to ADI's legacy Linear Technology LED driver product line, engineered specifically for space-constrained, battery-powered mobile devices requiring high-efficiency, low-EMI, multi-display lighting with precise current regulation and flexible control interfaces.
FAQ
What is the maximum continuous current capability of the CAM output on the LTC3207EUF#TRPBF?
The CAM output of the LTC3207EUF#TRPBF supports up to 300mA continuous current (per Absolute Maximum Ratings) and 460mA pulsed at 10% duty cycle. Its full-scale setting is 425mA, but sustained operation above 300mA requires thermal design validation due to power dissipation limits. The 2-second safety timer enforces automatic disable in high-current mode to protect against thermal overstress.
How does the LTC3207EUF#TRPBF determine when to switch from 1x to 1.5x charge pump mode?
The LTC3207EUF#TRPBF monitors voltage headroom at each enabled ULED or CAM current source. When any active output enters dropout - defined as insufficient voltage across the current source to maintain programmed current - the device waits ~400µs to confirm the condition, then switches to 1.5x mode. This behavior is fully automatic and requires no firmware intervention; the LTC3207EUF#TRPBF resets to 1x mode upon I²C register update or CAMHL falling edge.
Can the ULED outputs of the LTC3207EUF#TRPBF be used as general-purpose open-drain outputs?
Yes, the ULED1–ULED12 outputs of the LTC3207EUF#TRPBF can be configured as I²C-controlled open-drain general-purpose outputs (GPOs) by setting Bits 6 and 7 of their respective registers (REG1–REG12) to logic 1. In GPO mode, dropout detection is disabled, allowing rail-to-rail voltage swing without triggering charge pump mode changes - enabling flexible use beyond LED driving in the same IC.
What is the function of the ENU pin on the LTC3207EUF#TRPBF, and how does it interact with the charge pump?
The ENU pin on the LTC3207EUF#TRPBF provides hardware-based enable/disable control for preselected ULED outputs without I²C communication. When ENU transitions from low to high, it activates those outputs; a falling edge resets the charge pump to 1x mode if other outputs are active. If no other outputs are enabled, the LTC3207EUF#TRPBF enters full shutdown. This enables ultra-low-power wake-up lighting (e.g., for incoming calls) while minimizing host processor involvement.
Does the LTC3207EUF#TRPBF support independent brightness control for each of its 12 ULED outputs?
Yes, the LTC3207EUF#TRPBF provides fully independent 6-bit linear DAC control (64 steps) for each of its twelve ULED outputs (ULED1–ULED12), with full-scale current of 27.5mA ±10% and minimum step size of 0.436mA. Brightness, on/off state, blinking period (1.25s/2.5s), and gradation ramp time (0.24s/0.48s/0.96s) are all individually programmable via I²C sub-addresses REG1–REG12 - enabling pixel-level lighting control in segmented displays.
LTC3207EUF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 13
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 50mA, 425mA
- Frequency:
- 850kHz
- Dimming:
- Analog
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
LTC3207EUF#TRPBF FAQ
1.How can I place an order for LTC3207EUF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3207EUF#TRPBF 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 LTC3207EUF#TRPBF reliable?
The price and inventory of LTC3207EUF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3207EUF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3207EUF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3207EUF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3207EUF#TRPBF?
LTC3207EUF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3207EUF#TRPBF 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 LTC3207EUF#TRPBF?
For technical support, including LTC3207EUF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3207EUF#TRPBF requirements.
6.How does Aetrix verify that LTC3207EUF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3207EUF#TRPBF 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 LTC3207EUF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3207EUF#TRPBF?
All LTC3207EUF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3207EUF#TRPBF, 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 LTC3207EUF#TRPBF part is unused and in its original packaging.
Return procedure for LTC3207EUF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3207EUF#TRPBF Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR421UE6327HTSA1
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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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BCR421UFD-7
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