Catalog(1 parts)
| Part | Internal Switch(s)▲▼ | Voltage - Supply (Max)▲▼ | Operating Temperature▲▼ | Operating Temperature▲▼ | Number of Outputs▲▼ | Frequency▲▼ | Frequency▲▼ | Dimming | Type | Package / Case▲▼ | Package / Case | Package / Case▲▼ | Grade | Qualification | Voltage - Supply (Min)▲▼ | Supplier Device Package | Mounting Type | Topology | Current - Output / Channel▲▼ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS92643QPWPRQ1LED Driver IC 1 Output DC DC Regulator Step-Down (Buck) Analog, PWM Dimming 3A 16-HTSSOP | 36 V | -40 °C | 125 °C | 1 ul | 100000 Hz | 2200000 Hz | Analog, PWM | DC DC Regulator | 0.004399999976158142 m | 16-PowerTSSOP | 0.004394200164824724 m | Automotive | AEC-Q100 | 5.5 V | 16-HTSSOP | Surface Mount | Step-Down (Buck) | 3 A |
Key Features
• AEC-Q100 qualified for automotive applicationsGrade 1: –40°C to 125°C ambient operating temperatureDevice HBM classification level H1CDevice CDM classification level C5Functional Safety-CapableDocumentation available to aid functional safety system designInput voltage range: 5.5 V to 36 VOperation down to 5.15 V after start-upUp to 3-A continuous with 4% accuracyAdaptive on-time current controlLow offset high-side current sense amplifierStable with any combination of ceramic, and aluminum capacitorsProgrammable switching frequency from 100 kHz to 2.2 MHzAdvanced dimming operation1000:1 precision PWM dimming15:1 precision analog dimming1.4-kHz internal analog input to PWM duty cycle translationCycle-by-cycle switch overcurrent protectionOpen-drain fault indicator outputLED short circuit, open circuit and cable harness fault indicationThermal shutdown protectionAEC-Q100 qualified for automotive applicationsGrade 1: –40°C to 125°C ambient operating temperatureDevice HBM classification level H1CDevice CDM classification level C5Functional Safety-CapableDocumentation available to aid functional safety system designInput voltage range: 5.5 V to 36 VOperation down to 5.15 V after start-upUp to 3-A continuous with 4% accuracyAdaptive on-time current controlLow offset high-side current sense amplifierStable with any combination of ceramic, and aluminum capacitorsProgrammable switching frequency from 100 kHz to 2.2 MHzAdvanced dimming operation1000:1 precision PWM dimming15:1 precision analog dimming1.4-kHz internal analog input to PWM duty cycle translationCycle-by-cycle switch overcurrent protectionOpen-drain fault indicator outputLED short circuit, open circuit and cable harness fault indicationThermal shutdown protection
Description
AI
The TPS92643-Q1 is a monolithic, synchronous Buck LED driver with a wide 5.5-V to 36-V operating input voltage range and 40-V tolerance that supports load dump for duration of 400 ms. The TPS92643-Q1 implements an adaptive on-time average current mode control based on inductor valley current detection. The adaptive on-time control provides near constant switching frequency that can be set between 100 kHz and 2.2 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input, output and ambient temperature.
The high-performance LED driver can independently modulate LED current using both analog or PWM dimming techniques. Linear analog dimming range with over 15:1 range is obtained by setting the IADJ voltage. PWM dimming of LED current is achieved by directly modulating the UDIM input pin with desired duty cycle or setting the analog voltage at APWM to enable internal analog-to-PWM conversion. The internal PWM generator translates the external analog voltage by comparing it to an internal 1.4-kHz ramp signal.
The TPS92643-Q1 incorporates advanced diagnostic and fault protection featuring: cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short and thermal shutdown.
The TPS92643-Q1 is available in a 6.6-mm × 5.1-mm thermally-enhanced 16-pin HTSSOP package with 0.65-mm lead pitch.
The TPS92643-Q1 is a monolithic, synchronous Buck LED driver with a wide 5.5-V to 36-V operating input voltage range and 40-V tolerance that supports load dump for duration of 400 ms. The TPS92643-Q1 implements an adaptive on-time average current mode control based on inductor valley current detection. The adaptive on-time control provides near constant switching frequency that can be set between 100 kHz and 2.2 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input, output and ambient temperature.
The high-performance LED driver can independently modulate LED current using both analog or PWM dimming techniques. Linear analog dimming range with over 15:1 range is obtained by setting the IADJ voltage. PWM dimming of LED current is achieved by directly modulating the UDIM input pin with desired duty cycle or setting the analog voltage at APWM to enable internal analog-to-PWM conversion. The internal PWM generator translates the external analog voltage by comparing it to an internal 1.4-kHz ramp signal.
The TPS92643-Q1 incorporates advanced diagnostic and fault protection featuring: cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short and thermal shutdown.
The TPS92643-Q1 is available in a 6.6-mm × 5.1-mm thermally-enhanced 16-pin HTSSOP package with 0.65-mm lead pitch.