TPS3700DDCT - 18V Window Comparator | Texas Instruments
MPN: TPS3700DDCT ✓ Hoạt độngTPS3700DDCT Tóm tắt
A window comparator is a voltage supervisor that combines two threshold comparisons around a monitored signal. It belongs to the comparator and power-management IC hierarchy, where it is used to identify when a supply enters an allowed operating window or exits it because of an excessive low or high condition. The TPS3700 can therefore operate as a combined window detector or as two independent voltage monitors.
Key features include a wide 1.8 V to 18 V supply range, threshold accuracy of -1.0% over temperature, 0.25% typical threshold accuracy, and 5.5 uA typical quiescent current. The two open-drain outputs can be pulled up to an external voltage up to 18 V. Built-in hysteresis helps reject brief glitches and maintain stable outputs, while external resistors set the monitored voltage range.
The TPS3700DDCT uses two high-accuracy comparators and an internal 400 mV reference. One comparator monitors the lower threshold and the other monitors the upper threshold, allowing detection of undervoltage and overvoltage separately. The monitored voltage is scaled with external resistors, making the device suitable for systems where the rail is higher than the internal reference.
Typical applications include industrial 24 V input-bus monitoring, battery-pack protection, DC power-supply fault detection, load-switch sequencing, and embedded systems that require a hardware voltage supervisor. Its low quiescent current is useful in battery-powered equipment, while the 18 V operating range supports higher-voltage industrial rails.
When designing the circuit, choose resistor values to keep the sense-node voltage within the comparator input limits and use pull-up resistors appropriate for the open-drain outputs. Confirm the logic polarity of both outputs in the system controller because a fault indication can require inversion. Review the manufacturer datasheet for threshold, hysteresis, input-current, and absolute-maximum details before finalizing the PCB layout.
Bộ thay thế dễ dàng lắp đặt cho TPS3700DDCT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS3700DDCT (cùng hình factor và footprint) — khác nhau ở Package, Product Type, Output Type, Operating Temperature Range, Hysteresis.
TPS3700DDCR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS3700QDDCRQ1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS3700DDCT Tỷ lệ tối đa & tính chất điện
| Product Type | Window voltage comparator |
| Supply Voltage Range | 1.8 V to 18 V |
| Internal Reference | 400 mV |
| Number of Comparators | 2 |
| Monitored Voltage Threshold | Adjustable down to 400 mV |
| Threshold Accuracy Over Temperature | -1.0% |
| Typical Threshold Accuracy | 0.25% |
| Typical Quiescent Current | 5.5 uA |
| Kiểu đầu ra | Open drain |
| Output Voltage Rating | 18 V |
| Overvoltage Detection | Yes |
| Undervoltage Detection | Yes |
| Hysteresis | Built in |
| Khoảng nhiệt độ hoạt động | -40 C to +125 C |
| Hộp | 6-pin SOT-23-THIN |
| Kiểu lắp đặt | Surface mount |
| Trạng thái RoHS | Not stated in supplied verified data |
| Automotive Qualification | Not stated for TPS3700DDCT |
Hướng dẫn cấu hình chân TPS3700DDCT 6-pin sot-23-thin
Cấu hình chân cho TPS3700DDCT (6-pin sot-23-thin gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho TPS3700DDCT.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TPS3700DDCT phù hợp cho 6 Áp dụngs: Industrial 24 V Bus Monitoring, Battery Pack Protection, DC Power-Supply Fault Detection, Load-Switch Sequencing, Battery-Powered Embedded Systems, Automotive or High-Reliability Rail Supervision.
Industrial 24 V Bus Monitoring
The TPS3700DDCT is suitable for monitoring a divided industrial bus when the design must remain within the device's verified 1.8 V to 18 V supply range and the monitored signal is conditioned appropriately. Its two high-accuracy comparators can provide separate undervoltage and overvoltage indications, while the internal 400 mV reference supports threshold scaling through external resistors. The 18 V-rated open-drain outputs can drive a controller input, relay, or status indicator with an appropriate pull-up. The key design trade-off is that the bus divider, surge protection, and pull-up rail must be engineered separately because those values are not specified in the supplied verified data.
Được đề xuất
Battery Pack Protection
The TPS3700DDCT can supervise a battery-derived rail when a system needs explicit overvoltage and undervoltage fault signals rather than relying only on firmware. The two independent comparators allow the battery pack to remain within a defined operating window, while the 5.5 uA typical quiescent current helps limit monitoring overhead in portable designs. External resistors determine the sense points, and the open-drain outputs require pull-ups and a suitable logic interface. Cell chemistry, charger topology, and maximum pack voltage are not supplied, so the thresholds and protection strategy must be validated against the actual battery system.
Được đề xuất
DC Power-Supply Fault Detection
The TPS3700DDCT fits a DC power-supply output where the controller needs hardware detection of an out-of-range voltage. By comparing a divided output against upper and lower thresholds, the device can signal a fault before downstream circuitry is exposed to an incorrect rail. Built-in hysteresis helps reject brief disturbances, and the 18 V-rated open-drain outputs offer flexibility for pull-up to a system logic rail. The application must account for resistor tolerance, comparator accuracy, input bias, and the monitored rail's startup behavior. No compensation or filtering values are provided, so they should be selected using the system power profile and datasheet guidance.
Được đề xuất
Load-Switch Sequencing
The TPS3700's dual window-monitoring capability can be used around a load switch or power sequencer to detect whether a rail has entered its acceptable range. The upper comparator can identify an excessive voltage condition, while the lower comparator can indicate that the rail remains too low for downstream operation. Open-drain outputs are useful when the system controller expects active-low fault signals and can be pulled up to a local logic supply. Because the verified data does not specify enable timing, propagation delay, or output polarity relationships, sequencing logic must be verified from the official pinout and timing information before production use.
Được đề xuất
Battery-Powered Embedded Systems
The 5.5 uA typical quiescent current makes the TPS3700DDCT relevant to embedded systems where a continuous hardware voltage supervisor must not dominate standby power. Its integrated 400 mV reference and two comparators reduce the external circuitry needed for independent undervoltage and overvoltage monitoring. In a microcontroller-based product, the fault outputs can be routed to an interrupt, reset controller, or status LED. The actual standby impact depends on resistor currents, pull-up state, monitored-rail conditions, and duty cycle, none of which are specified in the supplied data and should be included in a real power budget.
Được đề xuất
Automotive or High-Reliability Rail Supervision
The TPS3700QDDCRQ1 comparison result identifies a 6-pin TSOT-23, 18 V automotive comparator variant in the TPS3700 family, making it a relevant reference when automotive qualification and high-reliability supervision are priorities. The TPS3700DDCT itself is the standard ordering variant identified in the supplied target data; its automotive qualification is not stated. Engineers should compare the official ordering table, pin functions, temperature range, and AEC-Q100 documentation before making a substitution. The open-drain architecture is useful for wired fault signaling, but system-level EMC, load-dump, and transient requirements need separate design work.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS3700DDCT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TPS3700DDCR | TPS3700QDDCRQ1 |
|---|---|---|---|
| Supply Voltage Range | 1.8 V to 18 V | Not stated in supplied result | 18 V |
| Internal Reference | 400 mV | Not stated in supplied result | Not stated in supplied result |
| Comparator Count | 2 | Not stated in supplied result | Dual comparator |
| Output Type | Two open-drain outputs | Not stated in supplied result | Open-drain comparison context |
| Threshold Accuracy | -1.0% over temperature; 0.25% typical | Not stated in supplied result | Not stated in supplied result |
| Quiescent Current | 5.5 uA typical | Not stated in supplied result | Not stated in supplied result |
| Operating Temperature | -40 C to +125 C for the TPS3700 family | Not stated in supplied result | Not stated in supplied result |
| Package | SOT-23-THIN (6-pin) | SOT-23-THIN family comparison; verify exact dimensions | TSOT-23 (6-pin) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
Bảo phân biệt quan trọng
- Integrated dual-window monitoring (vsTPS3700DDCR)
- High-voltage monitoring range (vsTPS3700QDDCRQ1)
- Low standby monitoring overhead (vsTPS3700QDDCRQ1)
Ghi chú thiết kế
Route the monitored-voltage divider close to the TPS3700DDCT input pins and keep the sense trace away from switching nodes and high-current paths. Place the comparator's external resistors according to the recommended network layout so that parasitic resistance does not materially change the threshold. Because the supplied verified data does not include exact resistor values or input bias current, final calculations must use the manufacturer datasheet and the actual monitored voltage.
Do not treat the internal 400 mV reference as the monitored-system threshold without including the external divider ratio. Verify the resistor equations, threshold tolerance, input bias current, and the device's absolute maximum ratings. The verified material confirms 1.8 V to 18 V supply operation and 18 V open-drain output capability, but it does not provide a safe monitored-input limit above that range; additional protection is required for higher-voltage buses.
The TPS3700DDCT has a verified 5.5 uA typical quiescent current, but total monitoring current also depends on the divider and output pull-ups. Estimate the added supply current using the actual resistor values and fault-state logic levels, then confirm that the pull-up rail remains within its permitted voltage. If the outputs are connected to a persistent logic rail, the pull-up network may dominate standby consumption even when the comparator itself is low power.
Account for both open-drain outputs and their logic polarity in the system design. Open-drain devices do not drive a valid high level by themselves; they require suitable pull-up resistors and a defined operating state when the fault is absent. Check whether downstream firmware expects active-low or active-high fault signaling, and test both undervoltage and overvoltage transitions rather than assuming the two outputs have identical polarity.
Thông tin tuân thủ
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for TPS3700DDCT. The comparison result separately identifies TPS3700QDDCRQ1 as automotive-oriented, but that does not establish the target's qualification.
