L6227QTR STMicroelectronics, L6227QTR Datasheet

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Features ■ Operating supply voltage from ■ 2.8 A output peak current (1.4 A DC) 0.73 Ω typ. value @ ■ R DS(on) ■ Operating frequency up to 100 kHz ■ Non dissipative overcurrent protection ■ ...

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Contents Contents 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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L6227Q 1 Electrical data 1.1 Absolute maximum ratings Table 1. Absolute maximum ratings Symbol Parameter V Supply voltage S Differential voltage between OUT1 , OUT2 OUT1 , OUT2 Bootstrap ...

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Electrical data 1.3 Thermal data Table 3. Thermal data Symbol R Thermal resistance junction-ambient max th(JA) 1. Mounted on a double-layer FR4 PCB with a dissipating copper surface of 0 ground layer connected through 18 via holes ...

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L6227Q 2 Pin connection Figure 2. Pin connection (top view) Note: 1 The pins are connected to die PAD 2 The die PAD must be connected to GND pin Pin connection 5/27 ...

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Pin connection Table 4. Pin description N° Pin Type 1, 21 GND GND 9 OUT1 Power output Bridge B output pin B 12 SENSE Power supply B 13 IN1 Logic input B 14 IN2 Logic ...

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L6227Q 3 Electrical characteristics Table 5. Electrical characteristics (T Symbol Parameter V Turn-on threshold Sth(ON) V Turn-off threshold Sth(OFF) I Quiescent supply current S T Thermal shutdown temperature J(OFF) Output DMOS transistors High-side + low-side switch ON R DS(on) resistance ...

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Electrical characteristics Table 5. Electrical characteristics (continued) (T Symbol Parameter PWM comparator and monostable I I Source current at pins RC RCA, RCB V Offset voltage on sense comparator offset t Turn OFF propagation delay PROP t Internal blanking time ...

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L6227Q Figure 3. Switching characteristic definition EN V th(ON) V th(OFF) I OUT 90% 10% D01IN1316 Figure 4. Overcurrent detection timing definition t FALL t D(OFF)EN I OUT I SOVER ON BRIDGE OFF V EN 90% 10% t OCD(ON) Electrical ...

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Circuit description 4 Circuit description 4.1 Power stages and charge pump The L6227Q integrates two independent power MOS Full Bridges. Each power MOS has an = 0.73 Ω (typical value @ 25 °C), with intrinsic fast freewheeling diode. Cross R ...

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L6227Q 4.2 Logic inputs Pins IN1 , IN2 , IN1 A B The internal structure is shown in are respectively Vthon = 1.8 V and Vthoff = 1.3 V. Pins EN and EN A Overcurrent and thermal protection MOSFETs (one ...

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Circuit description 4.3 Truth table Table 7. Truth table Inputs EN IN1 ( Valid only in case of load connected between OUT1 and OUT2 don't care ...

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L6227Q Figure 10 shows the typical operating waveforms of the output current, the voltage drop across the sensing resistor, the RC pin voltage and the status of the bridge. Immediately after the low-side power MOS turns on, a high peak ...

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Circuit description These values allow a sufficient range of t The capacitor value chosen for C pin R . The rise time t COFF charged before the next time the monostable is triggered. Therefore, the on time t depends by ...

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L6227Q Figure 12. Area where t 100 10 1 4.5 Slow decay mode Figure 13 shows the operation of the bridge in the slow decay mode. At the start of the off time, the lower power MOS is switched off ...

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Circuit description 4.6 Non-dissipative overcurrent protection The L6227Q integrates an overcurrent detection circuit (OCD). This circuit provides protection against a short circuit to ground or between two phases of the bridge. With this internal over current detection, the external current ...

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L6227Q Figure 15. Overcurrent protection waveforms I OUT I SOVER th(ON) V th(OFF) ON OCD OFF ON BRIDGE OFF Figure 16. t DISABLE ...

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Circuit description Figure 17. t DELAY 4.7 Thermal protection In addition to the ovecurrent protection, the L6227Q integrates a thermal protection for preventing the device destruction in case of junction over temperature. It works sensing the die temperature by means ...

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L6227Q 5 Application information A typical application using L6227Q is shown in application are shown in 200 nF should be placed between the power pins (VS L6227Q to improve the high frequency filtering on the power supply and reduce high ...

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Application information Figure 18. Typical application Note: To reduce the IC thermal resistance, therefore improve the dissipation path, the NC pins can be connected to GND. 20/27 L6227Q ...

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L6227Q 6 Output current capability and IC power dissipation Figure 19 In and and the IC power dissipation using PWM current control driving two loads, for two different driving types: – One full bridge time energized. – ...

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Thermal management 7 Thermal management In most applications the power dissipation in the IC is the main factor that sets the maximum current that can be delivered by the device in a safe operating condition. Therefore, it has to be ...

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L6227Q 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® ...

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Package mechanical data Figure 21. Package dimensions 24/27 L6227Q ...

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L6227Q 9 Order codes Table 10. Order code Order code L6227Q Package VFQFPN32 1.0 mm Order codes Packaging Tube 25/27 ...

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Revision history 10 Revision history Table 11. Document revision history Date 07-Dec-2007 10-Jun-2008 28-Jan-2009 26/27 Revision 1 First release Figure 18 on page 20 Updated: 2 Note 1 on page 4 Added: Table 3: Thermal data on page 4 3 ...

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... L6227Q Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...