TMP816PWR - 18V Single-Phase BLDC Fan-Motor Predriver | TI
MPN: TMP816PWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.92 | $0.92 |
| 10 | $0.83 | $8.30 |
| 100 | $0.69 | $69.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.46 | $460.00 |
| 3,000 | $0.39 | $1,170.00 |
TMP816PWR Overview
A fan-motor predriver is an integrated circuit that sits between a low-power controller and a high-current power stage, translating PWM and tachometer signals into the gate/base drive pulses that actually switch the external power transistors. In the broader component taxonomy it is a motor driver IC, which falls under power management ICs and is essential for converting logic-level commands into the multi-ampere drive currents required to spin a single-phase BLDC fan. Because the actual switching transistors sit outside the IC, the predriver itself dissipates very little power while still enabling multi-ampere motor drive.
Key features include a single-phase full-wave drive topology, an adjustable current limit threshold for motor protection, integrated FG (frequency-generator) tachometer output for closed-loop RPM sensing, and direct compatibility with an external PNP + N-MOSFET power stage. The low-saturation drive architecture reduces conduction loss and audible switching noise, while built-in thermal shutdown and current limiting provide robust protection against fan stall and PCB faults.
Technically, the TMP816PWR integrates a Hall-sensor comparator, an adjustable-speed PWM control loop, and the pre-driver output stage that swings the external PNP and NMOS gates to produce commutation. The adjustable current limit threshold lets designers set the maximum locked-rotor current with a single external resistor, protecting both the motor winding and the external FETs during stall. The combination of low quiescent current and high-efficiency external drive makes the part well suited to energy-conscious consumer and appliance designs.
Typical applications include large cooling fans for servers, telecom/networking switch and router blowers, industrial power-supply fans, and white-goods/air-conditioner indoor blower motors. The 18 V maximum supply tolerance also allows direct operation from 12 V buses with transient headroom for fault conditions.
When designing with the TMP816PWR, place the 0.1 µF VCC decoupling capacitor within one millimetre of the supply pin and minimize parasitic inductance in the gate-drive loop to the external FETs. The current-limit resistor should be chosen so the trip threshold sits at 120-150 % of the motor's rated running current to avoid nuisance trips during normal start-up transients.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond what is captured in the manufacturer datasheet alone.
Drop-in alternatives for TMP816PWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TMP816PWR (same form factor and footprint) — differing in Package, Control Interface, MSL Level, Peak Output Current, Protection Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TMP814PWR
✅ Drop-In📋 Reference alternative (not in catalog)
DRV8816PWP
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →DRV8886PWPR
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →DRV8804PWPR
✅ Drop-In✓ In Stock
$2.12 / Unit
View Datasheet →DRV8873HPWPR
✅ Drop-In✓ In Stock
$1.86 / Unit
View Datasheet →TMP816PWR Maximum Ratings & Electrical Characteristics
| Topology | Single-phase full-wave BLDC fan predriver |
| Supply Voltage (VCC) | 6 V to 16 V |
| Maximum Supply Voltage | 18 V |
| Load Voltage | 10 V |
| Output Current | 20 mA (gate drive to external PNP+NMOS) |
| Number of Outputs | 1 (pre-driver output pair) |
| Current Limit Threshold | Adjustable (external resistor) |
| Operating Temperature Range | -30 °C to +95 °C |
| Control Input | PWM speed command |
| Tachometer Output | FG (frequency-generator) signal |
| External Power Stage | PNP + N-channel MOSFET pair |
| Protection Features | Thermal shutdown, adjustable current limit, lock-rotor protection |
| Package | 20-pin TSSOP (PW), 4.40 mm width |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30 °C / 85 % RH) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Drive Method | Full-wave, sensored (Hall-element input) |
TMP816PWR Pin Configuration
| Pin 1 | H+ — Hall-element positive input |
| Pin 2 | H- — Hall-element negative input |
| Pin 3 | VCC — Power supply input (6 V to 16 V) |
| Pin 4 | GND — Ground |
| Pin 5 | ISET — Current-limit threshold set (external resistor to GND) |
| Pin 6 | PWM — PWM speed-command input |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | FG — Frequency-generator tachometer output |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | PGND — Power ground for gate-drive return |
| Pin 12 | HGND — High-side gate-drive return |
| Pin 13 | VDRV — Gate-drive bootstrap supply |
| Pin 14 | OUTP — Predriver output to external PNP base |
| Pin 15 | OUTN — Predriver output to external NMOS gate |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
TMP816PWR is suitable for 6 applications: Server and Datacenter Cooling Fans, Telecom and Networking Switch Blowers, Industrial Power-Supply Cooling Fans, White-Goods and HVAC Indoor Blowers, Automotive Cabin and Seat-Cooling Fans, Projector and Display Cooling Fans.
Server and Datacenter Cooling Fans
The TMP816PWR is well matched to server cooling-fan applications because its 6-16 V (18 V abs-max) supply range aligns with standard 12 V server fan buses, and its adjustable current-limit threshold protects against locked-rotor conditions common when fan bearings fail. The integrated Hall-sensor amplifier accepts the small-amplitude differential signal from the in-motor Hall element directly, while the FG tachometer output provides the closed-loop RPM feedback required by BMC thermal-management firmware. The TMP816's external PNP+NMOS drive enables multi-ampere fan currents up to several amps without the IC itself dissipating significant power, keeping junction temperature well below the 95 °C upper limit even at high inlet temperatures.
Recommended
Telecom and Networking Switch Blowers
Telecom switches and network routers typically use 12 V, 40-80 mm blower fans to force air through densely packed PCBAs. The TMP816PWR's 6-16 V supply range tolerates the 12 V ±10 % variation common on these buses, and its adjustable current limit protects the PNP+NMOS stage during fan stall. The TSSOP-20 footprint integrates the entire predriver function into approximately 6.5 mm × 6.5 mm of PCB area, leaving room for high-density multi-fan carrier boards. The 95 °C upper operating limit also covers telecom closet ambient conditions with adequate margin.
Recommended
Industrial Power-Supply Cooling Fans
Industrial AC-DC supplies use single-phase BLDC fans for forced-air cooling, where reliability for survival in dusty, high-temperature environments matters more than absolute efficiency. The TMP816PWR's integrated thermal-shutdown and lock-rotor protection circuits shut down the external FETs when the IC junction exceeds safe limits or when the motor stalls, preventing catastrophic failure in unattended installations. Its adjustable current limit lets designers tune the trip point to match 12 V fans drawing 0.2-0.8 A running current, while the FG output drives the supply's fan-fail alarm signal. The wide -30 °C to +95 °C operating range also covers cold-start and high-load conditions in industrial enclosures.
Recommended
White-Goods and HVAC Indoor Blowers
Appliance indoor blowers such as refrigerator evaporator fans, range-hood blowers, and air-conditioner indoor unit fans are large single-phase BLDC loads that benefit from the TMP816PWR's high-current external PNP+NMOS drive. The device's sensored commutation ensures smooth low-speed torque for variable-speed comfort control, while the adjustable current limit prevents motor damage if the blower is obstructed. The TSSOP-20 package survives the high-humidity, moderate-temperature environment inside white goods when paired with a conformal coating.
Recommended
Automotive Cabin and Seat-Cooling Fans
Automotive cabin fans and seat-cooling blowers run from 12 V vehicle buses where transient voltages up to 18 V occur during load-dump events. The TMP816PWR's 18 V abs-max rating provides the headroom needed to survive ISO 7637-2 pulse-2a/b transients without external protection. Its sensored commutation delivers quiet operation required in cabin environments, and its wide -30 °C operating range covers cold-start conditions. The TSSOP-20 footprint and external FET drive keep the predriver's self-heating minimal, an advantage in enclosed dashboard spaces.
Recommended
Projector and Display Cooling Fans
Projectors and large-format displays use high-air-volume single-phase BLDC fans to cool the lamp DLP and driver electronics. The TMP816PWR's ability to drive multi-ampere external PNP+NMOS pairs enables use of fans drawing 1-2 A at 12 V, which would saturate an integrated-FET predriver. The adjustable current limit also protects the lamp power supply if the projector fan stalls during operation, and the FG output feeds back to the main controller for over-temperature shutdown sequencing.
Recommended
Recommended Products Summary
Engineering reference data for TMP816PWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMP814PWR | DRV8816PWP | DRV8886PWPR | DRV8804PWPR | DRV8873HPWPR |
|---|---|---|---|---|---|---|
| Package | 20-pin TSSOP (PW) | 20-pin TSSOP (PW) - same | 20-pin TSSOP (PWP) - same | 20-pin TSSOP (PWP) - same | 20-pin TSSOP (PWP) - same | 20-pin TSSOP (PWP) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage (VCC) | 6 V to 16 V (18 V abs-max) | 6 V to 13 V (15 V abs-max) | 8.2 V to 45 V | 8 V to 38 V | 8.2 V to 45 V | 4.5 V to 38 V |
| Topology | Single-phase BLDC fan predriver | Single-phase BLDC fan predriver | Dual H-bridge predriver | Dual H-bridge stepper predriver | Quad-FET predriver | Dual H-bridge brush-DC predriver |
| External Power Stage | PNP + N-MOSFET pair | PNP + N-MOSFET pair | Dual H-bridge (4 FETs) | Dual H-bridge (4 FETs) | Quad-FET (4 N-FETs) | Integrated FETs (no external) |
| Adjustable Current Limit | Yes (external ISET resistor) | Yes (external ISET resistor) | Yes (external sense resistor) | Yes (internal configurable) | Yes (external sense resistor) | Yes (internal configurable) |
| Tachometer (FG) Output | Yes | Yes | No (stepper indexer only) | No (stepper indexer only) | No | No |
| Operating Temperature | -30 °C to +95 °C | -30 °C to +95 °C | -40 °C to +85 °C | -40 °C to +125 °C | -40 °C to +85 °C | -40 °C to +125 °C |
Key Differentiators
- Integrated Hall-sensor amplifier and FG tachometer output (vs DRV8816PWP)
- External PNP+NMOS drive enables multi-ampere fan currents (vs DRV8873HPWPR)
- Sensored single-phase BLDC topology optimized for fans (vs DRV8804PWPR)
Design Notes
Place a 0.1 µF X7R ceramic decoupling capacitor on VCC (pin 3) within 1 mm of the package, plus a bulk 10 µF electrolytic or tantalum on the same net. The TMP816 draws brief pulses of current from VCC during FET switching transitions; insufficient decoupling causes VCC droop that can trigger false lock-rotor events or the ISET comparator mis-triggering. For high-current fan applications also add a 1 µF ceramic on the VDRV bootstrap rail (pin 13).
The TMP816PWR's TSSOP-20 package has a theta_JA of approximately 90-110 C/W on a standard 2-layer JEDEC board. Even at the modest 20 mA gate-drive current, sustained operation in a sealed fan housing at 95 °C ambient can push the junction close to the 150 °C thermal-shutdown threshold if copper area is inadequate. Estimated: at 20 mA × 18 V × 0.5 (average switching duty) ≈ 0.18 W dissipation, junction rise ≈ 18-22 °C over ambient. Pour copper under and around the TSSOP-20 pad to keep junction rise under 25 °C.
Keep the external PNP and N-MOSFET within 5 mm of the OUTP (pin 14) and OUTN (pin 15) gate-drive outputs to minimize parasitic gate-loop inductance. Excessive loop inductance causes ringing that can exceed the FET Vgs rating and inject noise into the Hall-sensor inputs. Place the Hall element's bypass capacitor (typically 0.1 µF) directly at H+/H- pins 1 and 2, with traces routed as a differential pair away from the switching gate-drive loop to avoid false commutation.
The TMP816's adjustable current limit uses an external ISET resistor (pin 5) referenced to GND. Setting the threshold too low causes nuisance trips during motor start-up transients, while setting it too high defeats the protection purpose. A good rule of thumb is to set the trip threshold at 120-150 % of the motor's nameplate running current. Also verify the PWM input (pin 6) logic level matches the host microcontroller's 3.3 V or 5 V rail; tying PWM directly to VCC disables speed control.
Route the FG (tachometer, pin 9) trace away from the switching gate-drive nets (OUTP/OUTN) and away from the motor phase wires. The FG signal is a low-frequency open-drain output that can be contaminated by capacitive coupling to the high-dV/dt gate-drive edges, producing false RPM readings. Add a 10 kΩ pull-up on FG at the receiver end, and place a small RC filter (10 kΩ + 100 pF) if the receiving controller is sensitive to sub-microsecond glitches.
Compliance Information
RoHS and REACH compliant per TI product page. MSL-1 rated. Not AEC-Q100 qualified — designers needing automotive-grade reliability should contact TI for Q1 suffix availability. Lead-free matte-tin plating suitable for 260 °C peak reflow profiles.
