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Texas Instruments TPS65573DSST
- Part No.:
- TPS65573DSST
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
TPS65573DSST.pdf
- Description:
- IC INT PHOTO FLASH CHRGR 12-SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,791
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Product details
Overview
TPS65573DSST from Texas Instruments is an integrated photo flash charger and IGBT driver IC for xenon flash systems. It features a 50-V integrated power switch (RON = 0.4–0.7 Ω), programmable primary-side peak current (0.5–1.5 A), charge-complete detection with ±0.2 V accuracy at VFULL = VBAT + 29.0 V, and operates from VBAT = 1.4–12 V and VCC = 2.5–5.5 V. It is used in digital still cameras to rapidly charge flash capacitors and drive external IGBTs for xenon tube ignition.
For engineers reviewing the TPS65573DSST datasheet, TPS65573DSST pinout, TPS65573DSST application, or TPS65573DSST equivalent, key selection criteria include primary-side peak current programming via I_PEAK voltage, XFULL open-drain charge-complete signaling, SW terminal voltage rating up to 45 V, thermal shutdown at 150 °C, and compatibility with transformer-based flyback topologies for high-voltage flash charging.
Technical Context
The TPS65573DSST implements a fixed-frequency PWM-controlled flyback charger with three internal comparators: U1 (VFULL) detects charge completion, U2 (VZERO) senses zero-current crossing for synchronous SW turn-on, and U3 (IPEAK) triggers SW turn-off when primary current exceeds the threshold set by the I_PEAK pin voltage. All sensing occurs on the primary side, eliminating secondary-side feedback components.
Its dual IGBT gate drivers-G_IGBT_P (pull-up to VCC) and G_IGBT_N (pull-down to GND)-provide complementary 3–7.5 Ω ON-resistance outputs to drive external IGBT gates, requiring external series resistors per IGBT datasheet requirements. Flash initiation requires both F_ON and F_EN asserted high, while CHG enables/disables charging independently.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (VBAT) | 1.4 V to 12 V - supports single-cell Li-ion up to 3-cell NiMH battery inputs without pre-regulation |
| Input Voltage Range (VCC) | 2.5 V to 5.5 V - compatible with standard logic supply rails and low-dropout regulators |
| SW Terminal Max Voltage | 45 V - enables safe operation with transformer leakage spikes during flyback discharge |
| Programmable Peak Current | 0.5 A to 1.5 A - set by analog voltage (0.1–1.5 V) on I_PEAK pin for battery-aware current limiting |
| Charge-Complete Detection | VSW ≥ VBAT + 29.0 V ±0.2 V - precise primary-side sensing eliminates optocoupler or secondary divider |
| Thermal Shutdown Threshold | 150 °C - latches off until die cools and CHG is toggled low to reset |
| XFULL Output Type | Open-drain - allows wired-OR with other status signals and flexible pull-up voltage selection |
Pinout & Package
TPS65573DSST uses a 2-mm × 3-mm, 12-pin WSON package with exposed thermal pad (PowerPAD™). Pin 7 (GND) and Pin 8 (TEST_GND) must both be connected to the PCB ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 F_EN | Digital input | Flash enable override: forces IGBT disable even if F_ON is high; required for safety interlock |
| 2 F_ON | Digital input | Primary flash trigger: initiates IGBT gate drive only when F_EN is also high |
| 3 CHG | Digital input | Charging enable latch: rising edge starts flyback charging; falling edge terminates and resets XFULL |
| 4 I_PEAK | Analog input | Peak current programming node: 0.1–1.5 V sets 0.5–1.5 A SW current limit via internal transconductance |
| 5 VBAT | Analog input | Battery monitor reference: supplies bias for VFULL/VZERO comparators and OCP threshold scaling |
| 6 SW | Power switch output | Drains primary winding of flyback transformer; rated for 45 V and 1.5 A continuous pulsed current |
| 7 GND | Power/Signal ground | Main return path for SW current, internal logic, and thermal pad connection |
| 8 TEST_GND | Ground | Factory test node; must be shorted to GND and ground plane - not functional in application |
| 9 G_IGBT_N | IGBT gate driver (low-side) | Pull-down output: sinks current to turn off IGBT; requires external series resistor for dV/dt control |
| 10 G_IGBT_P | IGBT gate driver (high-side) | Pull-up output: sources current to turn on IGBT; requires external series resistor matching G_IGBT_N |
| 11 VCC | Supply input | IC core and gate driver supply; bypass with 1-µF ceramic capacitor close to pin |
| 12 XFULL | Open-drain output | Charge-complete flag: pulls low only after VSW ≥ VBAT + 29.0 V; high-impedance during fault or charging |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side charge completion sensing | Eliminates secondary-side feedback circuitry, reducing BOM count and layout area in compact camera modules |
| Programmable peak current via analog I_PEAK pin | Enables dynamic current scaling - e.g., higher current early in charge cycle, lower near full charge - extending battery life |
| Dual complementary IGBT gate drivers | Provides matched rise/fall timing control for reliable xenon tube triggering without external driver ICs |
| Integrated overcurrent protection (OCP) | Detects SW-to-VBAT voltage drop during ON time, latching off on fault to prevent transformer saturation or MOSFET failure |
| Thermal shutdown with latch-off behavior | Prevents thermal runaway in enclosed camera housings; requires explicit CHG toggle to resume operation |
Applications
| Digital Still Cameras | Optical Film Cameras |
|---|---|
|
Use Scenario: Compact DSLR or mirrorless camera requiring rapid flash recharge between shots under variable battery conditions. IC Role / Device Role / Timing Role: Primary-side flyback controller and IGBT driver - manages energy transfer from battery to flash capacitor and triggers xenon tube ignition. Use Value: Achieves <1 s full-charge time from 3.7 V Li-ion using optimized PWM algorithm and 0.5–1.5 A programmable current, minimizing user wait time. |
Use Scenario: Retro-style film camera with electronic flash module needing reliable high-voltage generation from alkaline batteries. IC Role / Device Role / Timing Role: Battery-efficient flash charger - regulates charging based on VBAT = 1.4–12 V range and provides precise VFULL detection for consistent flash output. Use Value: Maintains stable flash energy across aging alkaline cells by scaling peak current via I_PEAK, preventing underexposure as battery voltage drops. |
| Digital Video Camcorders | Cell Phones (Legacy) |
|
Use Scenario: HD camcorder with built-in xenon flash for low-light video capture requiring minimal power draw during standby. IC Role / Device Role / Timing Role: Low-quiescent charger - draws only 1 µA in full-disable mode (CHG = GND, F_EN = GND) to preserve battery during recording. Use Value: Extends camcorder runtime by >15% versus discrete solutions due to integrated SW and ultra-low ICC3 standby current. |
Use Scenario: Feature phone with integrated xenon flash where PCB space is constrained and EMI must be minimized. IC Role / Device Role / Timing Role: Space-optimized flash subsystem - replaces ≥8 discrete components (MOSFET, driver, comparators, references) in 2 mm × 3 mm WSON package. Use Value: Reduces solution footprint by 60% versus discrete implementation while meeting stringent RF-sensitive mobile EMI limits via controlled SW edge rates. |
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 |
|---|---|---|---|
| MAX16832AASA+ | Higher VSW rating (60 V), no integrated IGBT drivers - requires external driver stage; uses current-mode control instead of primary-side VFULL sensing | Preferred for industrial strobes requiring >50 V output or multi-flash sequencing; lacks XFULL-compatible charge-done signal | Select when higher output voltage or programmable frequency is required; accept added component count and layout complexity |
| LT3494EDD#TRPBF | Fixed 1.2 A peak current, no I_PEAK programming; includes integrated Schottky diode but no IGBT drivers; smaller 3 mm × 3 mm DFN | Suitable for cost-sensitive point-and-shoot cameras with fixed battery configuration; cannot drive IGBTs directly | Choose for simplified design with known battery profile and no need for xenon tube timing flexibility |
Compared with MAX16832AASA+ and LT3494EDD#TRPBF, the TPS65573DSST uniquely integrates primary-side charge termination, dual IGBT drivers, and analog peak current programming in a single 2 mm × 3 mm WSON package - enabling compact, battery-adaptive xenon flash systems without secondary sensing or external drivers.
Availability
TPS65573DSST is available at Aetrix Electronics and suitable for digital still cameras, optical film cameras, and legacy cell phones requiring stable component supply for xenon flash subsystems.
Supply support for TPS65573DSST 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 over 50 years of innovation in precision analog ICs.
The TPS65573DSST belongs to TI's photo flash power management product line, designed specifically for compact, high-efficiency xenon flash charging and IGBT driving in portable imaging devices.
FAQ
What is the recommended minimum VBAT voltage for reliable operation of the TPS65573DSST?
The TPS65573DSST specifies a minimum VBAT of 1.4 V per the datasheet's Recommended Operating Conditions. At this voltage, the device maintains proper comparator biasing and SW gate drive strength. Operation below 1.4 V may cause erratic charging behavior or failure to initiate the flyback cycle. For optimal performance in digital still cameras, maintain VBAT ≥ 2.5 V during flash charging.
How does the TPS65573DSST detect charge completion without secondary-side feedback?
The TPS65573DSST uses primary-side sensing: the VFULL comparator monitors the voltage at the SW pin relative to VBAT. When VSW exceeds VBAT + 29.0 V (±0.2 V), it asserts XFULL low. This method relies on transformer turns ratio and primary-side flyback voltage reflection, eliminating optocouplers or secondary dividers - a key feature confirmed in the Block Diagram and Electrical Characteristics tables of the SLVS868 datasheet.
Can the TPS65573DSST drive IGBTs directly, or are external components required?
The TPS65573DSST provides dual gate drive outputs (G_IGBT_P and G_IGBT_N) but requires external series resistors on both paths to control dV/dt and prevent IGBT oscillation or gate damage. The datasheet explicitly states "The external resistor should be needed at outside. The value depends on the characteristics of IGBT." No internal pull-up/pull-down resistors are included, so external Rg is mandatory for safe IGBT switching.
What happens to the TPS65573DSST during overcurrent events, and how is recovery performed?
During overcurrent, the TPS65573DSST triggers OCP when the SW pin voltage drops below VBAT − 100 mV during the ON period. The device latches off and holds XFULL in high-impedance state. Recovery requires driving CHG low to reset the internal latch, then reasserting CHG high only after the fault condition (e.g., shorted transformer or defective IGBT) is resolved - a behavior verified in the Protection section and Electrical Characteristics table.
Is the TPS65573DSST suitable for new designs, and what is its lifecycle status?
No - the TPS65573DSST is marked "Not Recommended for New Designs" (NRND) per TI's Package Option Addendum. It remains in production to support existing customers but TI advises against its use in new projects. Engineers should evaluate modern alternatives like the TPS65573's successors or functionally equivalent flash chargers with active support and extended temperature ranges before committing to TPS65573DSST in new schematics.
TPS65573DSST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- Photoflash Capacitor Charger, Xenon
- Current - Supply:
- 2mA
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -35°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-WSON (3x2)
TPS65573DSST FAQ
1.How can I place an order for TPS65573DSST through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65573DSST 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 TPS65573DSST reliable?
The price and inventory of TPS65573DSST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65573DSST is usually 5 days.
3.What payment methods are accepted for TPS65573DSST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65573DSST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65573DSST?
TPS65573DSST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65573DSST 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 TPS65573DSST?
For technical support, including TPS65573DSST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65573DSST requirements.
6.How does Aetrix verify that TPS65573DSST is sourced from the original manufacturer or authorized distributors?
All TPS65573DSST 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 TPS65573DSST meets industry standards.
7.What is the process for return or replacement of TPS65573DSST?
All TPS65573DSST units undergo pre-shipment inspection (PSI). If there is an issue with TPS65573DSST, 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 TPS65573DSST part is unused and in its original packaging.
Return procedure for TPS65573DSST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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