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Texas Instruments TPS65561RGTT
- Part No.:
- TPS65561RGTT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS65561RGTT.pdf
- Description:
- IC PHOTO FLSH CHRGR/IGBT 16-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
TPS65561RGTT from Texas Instruments is an integrated photo flash charger and IGBT driver IC for xenon flash systems. It combines a 50-V integrated power switch, programmable peak current control (1.1–2.2 A), primary-side output voltage feedback, and thermal/overcurrent protection in a single 16-pin QFN package. It operates from 1.6 V to 12 V battery input and delivers fast, high-efficiency flash capacitor charging for digital still cameras.
For engineers reviewing the TPS65561RGTT datasheet, TPS65561RGTT pinout, TPS65561RGTT application, or TPS65561RGTT equivalent, key selection criteria include its integrated IGBT gate driver (G_IGBT), XFULL charge-complete open-drain indicator, SW terminal voltage rating (−0.6 V to 50 V), and programmable I_PEAK interface for adaptive peak current control under varying battery conditions.
Technical Context
The TPS65561RGTT implements a flyback-based DC-DC converter with internal PWM control logic optimized for photo flash charging. Its switching cycle is governed by real-time monitoring of SW terminal voltage (V(SW)) and primary-side current via the I_PEAK pin, enabling zero-current switching detection (V(ZERO) = 1–60 mV) and full-charge detection (V(FULL) = 28.6–29.4 V).
It integrates dual protection mechanisms: overvoltage detection at SW (OVDS = 1.35–1.95 V) to guard against transformer short circuits, and thermal shutdown at TJ = 150–170°C. The device uses a fixed-frequency, variable-duty-cycle architecture with MAX ON time (50–160 µs) and MAX OFF time (25–80 µs) limits to ensure robust operation across low-battery and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range (VBAT) | 1.6 V to 12 V - supports single-cell Li-ion up to multi-cell alkaline inputs without external regulation. |
| SW terminal voltage rating | −0.6 V to 50 V - enables safe operation with high-voltage flyback transformer secondary coupling and xenon tube discharge transients. |
| Programmable peak current | 1.1 A to 2.2 A - set via analog voltage on I_PEAK pin (0.6–2.4 V), allowing dynamic adaptation to battery state-of-charge. |
| Charge completion threshold | V(FULL) = 28.6–29.4 V - precise primary-side feedback eliminates need for optocoupler or secondary-side sensing. |
| Thermal shutdown threshold | 150–170°C - protects against sustained overload or poor PCB thermal design while permitting brief peak-power operation. |
| Switch ON resistance | R(ONSW) = 0.4–0.9 Ω - minimizes conduction loss during charging cycles, improving efficiency at high peak currents. |
| Propagation delay (CHG↑ to SW ON) | 12 µs - ensures rapid response to charge enable commands, critical for burst-mode flash timing accuracy. |
Pinout & Package
TPS65561RGTT is housed in a 16-pin VQFN package (RGT) with exposed thermal pad (3.15 mm × 3.15 mm, 1.0 mm max height). The PowerPAD™ must be soldered to PCB ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, SW | Power switch output | Connects to primary winding of flyback transformer; handles up to 3 A pulsed current and 50 V transient voltage. |
| 3, VCC | Bias supply input | Provides internal logic and driver bias (2.7–4 V); requires local 1-µF ceramic decoupling. |
| 4, F_ON | IGBT gate enable input | Logic-high signal initiates flash discharge when CHG is low; drives external IGBT gate via G_IGBT output. |
| 6, I_PEAK | Peak current programming input | Analog voltage (0.6–2.4 V) sets I(SW) limit; enables battery-aware current scaling to maintain charge time consistency. |
| 7, G_IGBT | IGBT gate driver output | Pull-up/pull-down driver (8–70 Ω) swings from PGND to VCC to directly drive external IGBT gates. |
| 9, XFULL | Charge completion indicator | Open-drain output pulled low when V(SW) ≥ V(FULL); used by host controller to trigger flash firing sequence. |
| 10, CHG | Charge enable input | Active-high logic input starts/stops charging cycle; latched internally to prevent spurious restarts. |
| 11, 12, PGND | Power ground | High-current return path for SW and internal drivers; must connect to low-impedance PCB ground plane. |
| 14, TEST_GND | Factory test ground | No functional role in application; tie to PGND per datasheet recommendation. |
| 15, VBAT | Battery input | Main power source (1.6–12 V); bypassed with 10-µF + 1-µF ceramics to handle high di/dt during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50-V power switch | Eliminates external MOSFET, reducing BOM count and PCB area while maintaining safe operation with xenon tube discharge voltages. |
| Primary-side output voltage feedback | Enables accurate VOUT regulation without optocoupler or secondary-side components, simplifying isolation and improving reliability. |
| Programmable peak current via I_PEAK | Allows real-time adjustment of charging current based on battery voltage or system load, preserving consistent flash energy across battery discharge. |
| XFULL open-drain charge-complete indicator | Provides unambiguous, low-latency signal to host processor that flash capacitor has reached target voltage, enabling precise flash timing. |
| Dual protection: OVDS and thermal shutdown | Prevents damage from transformer shorts (via SW pin overvoltage detection) and thermal runaway (150–170°C trip), ensuring field robustness. |
Applications
| Digital Still Cameras | Optical Film Cameras |
|---|---|
|
Use Scenario: Charging a 300–400 V xenon flash capacitor from a 3.7 V Li-ion battery within ≤2 s. IC Role / Device Role / Timing Role: Primary-side flyback controller and IGBT gate driver; manages charging cycle, detects full charge via XFULL, and triggers flash discharge via F_ON/G_IGBT. Use Value: Reduces component count by integrating switch, reference, driver, and protection-enabling compact camera modules with <200 ms typical charge time at 4.2 V input. |
Use Scenario: Replacing discrete charge pump + SCR-based flash circuits in legacy film SLR cameras with modern battery inputs. IC Role / Device Role / Timing Role: Standalone flash charger IC with programmable I_PEAK and V(FULL) thresholds; interfaces directly to mechanical shutter timing logic via CHG/F_ON. Use Value: Enables direct drop-in replacement of aging discrete solutions while supporting wider input range (1.6–12 V) and eliminating manual calibration of charge time. |
| Portable Medical Imaging Devices | Industrial Inspection Flash Systems |
|
Use Scenario: Delivering repeatable flash pulses for handheld dermatoscopes or ophthalmic imaging tools powered by replaceable AA/AAA batteries. IC Role / Device Role / Timing Role: Battery-adaptive flash charger; uses I_PEAK voltage scaling to maintain constant flash energy as battery voltage drops from 1.6 V to 12 V. Use Value: Ensures consistent image brightness across battery life without firmware intervention-critical for diagnostic image repeatability. |
Use Scenario: High-reliability flash triggering in factory-floor machine vision systems where ambient temperature exceeds 70°C. IC Role / Device Role / Timing Role: Ruggedized flash controller with thermal shutdown (150–170°C) and OVDS protection; operates continuously in sealed enclosures with limited airflow. Use Value: Prevents field failures due to thermal stress or transformer faults-reducing unplanned downtime in automated inspection lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar photo flash charger and IGBT driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65560RGTT | Same pinout and core functionality but lacks integrated IGBT driver; G_IGBT pin is absent and replaced by NC. | Requires external IGBT driver circuitry; suitable only when discrete gate driving is preferred or required for higher voltage/current. | Select TPS65560RGTT only if system-level IGBT control demands separate driver timing or higher gate drive strength than G_IGBT provides. |
| MAX16833AUB+ | Higher V(SW) rating (65 V), but no integrated IGBT driver or XFULL indicator; uses external sense resistor for current limiting. | Designed for LED flash, not xenon; lacks V(FULL) feedback and primary-side regulation architecture needed for capacitor charging. | Choose MAX16833AUB+ only for LED-based strobes requiring >50 V headroom; not a functional substitute for xenon flash capacitor charging. |
Compared with TPS65561RGTT, TPS65560RGTT removes IGBT integration-increasing BOM and layout complexity-while MAX16833AUB+ targets LED loads and omits the essential primary-side feedback and charge-completion signaling needed for xenon systems.
Availability
TPS65561RGTT is available at Aetrix Electronics and suitable for digital still cameras, optical film cameras, portable medical imaging devices, and industrial inspection flash systems requiring stable component supply and long-term design continuity.
Supply support for TPS65561RGTT 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with decades of leadership in precision power conversion and interface solutions.
The TPS65561RGTT belongs to TI's photo flash power management product line, designed specifically to replace multi-chip discrete solutions in xenon flash applications with a single, highly integrated IC delivering fast charge time, high efficiency, and robust protection.
FAQ
What is the maximum allowable input voltage on the VBAT pin of the TPS65561RGTT?
The absolute maximum rating for VBAT is 13 V, but the recommended operating range is 1.6 V to 12 V. Exceeding 12 V may cause premature device stress or reduce long-term reliability, even if within absolute maximum limits. The TPS65561RGTT is optimized for battery-powered systems including single-cell Li-ion (up to 4.2 V), NiMH, and multi-cell alkaline sources.
How does the TPS65561RGTT detect full charge without a secondary-side voltage sensor?
The TPS65561RGTT uses primary-side output voltage feedback by monitoring the reflected flyback voltage at the SW pin. When the secondary-side capacitor reaches the target voltage (V(FULL) = 28.6–29.4 V), the corresponding primary-side kickback voltage crosses the internal V(FULL) threshold, triggering the XFULL pin to pull low. This eliminates optocouplers and secondary-side components while maintaining ±0.4 V regulation accuracy.
Can the TPS65561RGTT drive an IGBT directly, and what are the gate drive specifications?
Yes, the TPS65561RGTT integrates a dedicated IGBT gate driver on the G_IGBT pin. It provides rail-to-rail swing (PGND to VCC) with pull-up resistance of 8–19.4 Ω and pull-down resistance of 36–70 Ω at VCC = 3 V. This allows direct connection to standard N-channel IGBTs with gate thresholds ≤3 V and Qg ≤100 nC, eliminating external driver stages in most xenon flash designs.
What happens if the TPS65561RGTT encounters an overvoltage condition at the SW pin during switching?
If the SW pin voltage exceeds the OVDS threshold (1.35–1.95 V) while the internal switch is ON, the TPS65561RGTT immediately latches off to protect against transformer primary short circuits. The device remains disabled until CHG is cycled low-then-high. This OVDS protection is independent of thermal or overcurrent shutdown and is specifically intended to prevent destructive current flow through a shorted transformer winding.
Is the TPS65561RGTT still in active production, and what is its packaging format?
The TPS65561RGTT is marked "NRND" (Not Recommended for New Designs) in TI's official documentation but remains in active production with confirmed availability through authorized distributors. It ships in a 16-pin VQFN (RGT) package with exposed thermal pad, supplied in small tape-and-reel format (250 units per reel), RoHS-compliant, and rated for −30°C to +85°C operating temperature.
TPS65561RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Photoflash Capacitor Charger, Xenon
- Current - Supply:
- 1.3mA
- Voltage - Supply:
- 2.7V ~ 4V
- Operating Temperature:
- -35°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (3x3)
TPS65561RGTT FAQ
1.How can I place an order for TPS65561RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65561RGTT 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 TPS65561RGTT reliable?
The price and inventory of TPS65561RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65561RGTT is usually 5 days.
3.What payment methods are accepted for TPS65561RGTT?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65561RGTT?
TPS65561RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65561RGTT 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 TPS65561RGTT?
For technical support, including TPS65561RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65561RGTT requirements.
6.How does Aetrix verify that TPS65561RGTT is sourced from the original manufacturer or authorized distributors?
All TPS65561RGTT 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 TPS65561RGTT meets industry standards.
7.What is the process for return or replacement of TPS65561RGTT?
All TPS65561RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65561RGTT, 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 TPS65561RGTT part is unused and in its original packaging.
Return procedure for TPS65561RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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