Data Sheet
TPS65131-Q1 正负输出直流/直流转换器
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1 特性
- 符合汽车应用要求
- AEC-Q100 测试指导结果如下：
- 器件温度等级 2：–40°C 至 105°C 环境工作温度范围
- 在 –40°C 至 125°C 结温范围内测试了电气特性
- 器件 HBM ESD 分类等级 H1C
- 器件 CDM ESD 分类等级 C4B
- 高达 15V 和低至 –15V 的双向可调输出电压
- 对升压和逆变器主开关具有 2A 典型开关电流限制
- 高转换效率
- 正输出轨高达 91%
- 负输出轨高达 85%
- 低负载状态下的省电模式
- 上电和断电时序的独立使能输入
- 用于外部 PFET 的控制输出可支持在关断时完全断电
- 输入电压范围为 2.7V 至 5.5V
- 最小 1.25MHz 固定频率 PWM 运行
- 热关断
- 在两个输出上提供过压保护
- 0.2µA 典型关断电流
- 具有可湿性侧面的小型 4mm × 4mm QFN-24 封装 (RGE)
2 应用
- 小尺寸至中等尺寸 OLED 显示器
- (TFT) LCD、CCD 辅助电源
3 说明
TPS65131-Q1 器件作为双输出直流/直流转换器，可产生高达 15V 的正输出电压和低至 -15V 的负输出电压，输出电流通常为 200mA，具体值取决于输入电压与输出电压比。凭借高达 85% 的总体效率，此器件非常适合于便携式电池供电类设备。输入电压范围为 2.7V 至 5.5V，因此允许诸如 3.3V 和 5V 的电压轨为 TPS65131-Q1 器件供电。TPS65131-Q1 器件采用具有散热焊盘和可湿性侧面的 QFN-24 封装。由于只需少量较小的外部组件，因此总体解决方案尺寸可以非常小。
此转换器采用定频 PWM 控制拓扑运行，而且在启用省电模式后，它在轻负载电流的情况下使用脉冲跳跃模式。在运行时，典型的总体器件静态电流只有 500µA。在关断状态下，器件一般消耗 0.2µA。独立使能引脚可实现针对两个输出的加电和断电排序。为了尽可能地实现故障情况下的高可靠性，此器件有一个内部电流限制、过压保护和热关断。
TPS65131-Q1 器件符合汽车应用标准（根据 AEC-Q100 温度等级 2）。该器件在 –40°C 至 125°C 的器件结温范围内接受了电气特性测试。此外，该器件还具有最低关断电流、小巧的解决方案尺寸、带散热焊盘的封装以及良好的效率和保护特性，专为汽车和工业应用而设计。
封装信息(1)
| 器件型号 | 封装 | 本体尺寸（标称值） |
|---|---|---|
| TPS65131-Q1 | VQFN (24) | 4mm × 4mm |
(1) 如需了解所有可用封装，请参阅可订购产品附录。
应用原理图4 Device Comparison
Table 4-1 Device Comparison
Table
| Part Number | Package | Wettable Flanks |
|---|---|---|
| TPS65131TRGERQ1 | VQFN (24) | No |
| TPS65131WTRGERQ1 | VQFN (24) | Yes |
5 Pin Configuration and Functions
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Figure 5-1 24-pin VQFN Bottom View
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Figure 5-2 24-pin VQFN
Top View
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Table 5-1 Pin Functions
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| AGND | 19 | — | Analog ground pin |
| BSW | 7 | O | Gate-control pin for external battery switch. This pin goes low when ENP is set high. |
| CN | 18 | I/O | Compensation pin for inverting converter control |
| CP | 21 | I/O | Compensation pin for boost converter control |
| ENN | 10 | I | Enable pin for the negative-output voltage (0V: disabled, VIN: enabled) |
| ENP | 8 | I | Enable pin for the positive-output voltage (0V: disabled, VIN: enabled) |
| FBN | 16 | I | Feedback pin for the negative-output voltage divider |
| FBP | 22 | I | Feedback pin for the positive-output voltage divider |
| INN | 5, 6 | O | Inverting converter switch pin |
| INP | 1, 24 | O | Boost converter switch pin |
| NC(1) | 12, 20 | — | Not connected |
| OUTN | 13, 14 | I/O | Inverting converter switch output |
| PGND | 2, 3 | — | Power ground pin |
| PSN | 11 | I | Power-save mode enable for inverter stage (0V: disabled, VIN: enabled) |
| PSP | 9 | I | Power-save mode enable for boost converter stage (0V: disabled, VIN: enabled) |
| VIN | 4 | I | Control supply input |
| VNEG | 15 | I | Negative-output voltage-sense input |
| VPOS | 23 | I | Positive-output voltage-sense input |
| VREF | 17 | O | Reference output voltage. Bypass this pin with a 220nF capacitor to ground. Connect the lower resistor of the negative-output voltage divider to this pin. |
| Thermal pad | Thermal pad for thermal performance, connect to PGND | ||
(1) NC - No internal connection
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature, unless otherwise noted (1)
| VALUE | UNIT | |||
|---|---|---|---|---|
| MIN | MAX | |||
| Input voltage range at pins VIN, INN (2) | –0.3 | 6 | V | |
| Voltage at pin VPOS (2) | –0.3 | 17 | V | |
| Voltage at pin VNEG (2) | –17 | V(VIN) + 0.3 | V | |
| Voltage at pins ENN, ENP, FBP, FBN, CN, CP, PSP, PSN, BSW (2) | –0.3 | V(VIN) + 0.3 | V | |
| Input voltage at pin INP (2) | –0.3 | 17 | V | |
| Differential voltage between pins OUTN to INN (2) | –0.3 | 24 | V | |
| Thermal pad(2) | –0.3 | 0.3 | V | |
| TJ | Operating junction temperature | –40 | 150 | °C |
| Tstg | Storage temperature range | –65 | 150 | °C |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to the network ground pin, unless otherwise noted.
6.2 ESD Ratings
| VALUE | UNIT | |||||
|---|---|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human body model (HBM), per AEC Q100-002(1) | ±1000 | V | ||
| Charged device model (CDM), per AEC Q100-011 | ±750 | V | ||||
(1) AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
6.3 Recommended Operating Conditions
over operating free-air temperature, unless otherwise noted
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| VI , V(VIN), V(INN) | Application input voltage range, input voltage range at VIN and INN pins | 2.7 | 5.5 | V |
| VPOS | Adjustable output voltage range for the boost converter | VI + 0.5 | 15 | V |
| VNEG | Adjustable output voltage range for the inverting converter | –15 | –2 | V |
| V(ENN), V(ENP) | Enable signals voltage | 0 | 5.5 | V |
| V(PSN), V(PSP) | Power-save mode enable signals voltage | 0 | 5.5 | V |
| TA | Operating free-air temperature range(1) | –40 | 105 | °C |
| TJ | Operating junction temperature range | –40 | 125 | °C |
(1) In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may require derating. See Thermal Information for details.
