2955-2 ALLEGRO

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Technical content

| ALLEGRO MICROSYSTEMS INC 33E D MM 0504338 0005155 ? MMALGR The UDN2955W-2 halt-bridge power driver combines a high- current, half-bridge power driver with low-level control and protection circuitry. For PWM applications there are provisions for output current sensing and an ENABLE (active low) input. The output can source or GROUND a sink up to 6 A continuously. This device features a minimum break- surety (= — down and sustaining voltage of 40 V. It can be used in pairs for full- No CONNECTION =a bridge operation or in triplets for 3-phase brushless de motors. source our =—} Protection is included which shuts down the device during over- source 1 EPS temperature conditions caused by loss of cooling; internal flyback and clamp diodes are included for switching inductive loads. Internal logic SENSE [&—] lockout and delays prevent potentially destructive crossover currents. . ENABLE = J The logic inputs are compatible with TTL and 5 V CMOS lagic systems. SINK IN @—}-[>o A similar device, excluding the ENABLE and output current sensing NO CONNECTION [= provision, in a 5-lead TO-220 style package, is the UDN2951Z-2. aa | The UDN295SW-2 lied in a 12-lead tab single in-ti e /-2 is supplied in a 12-lead power-tab single in-line NO CONNECTION [2—jxe plastic package. The tab is at ground potential, allowing multiple No CONNECTION [xe devices to share a common heat sink.

FEATURES

ow erces | Mf £6A Continuous Output Current - 1 Output Voltage to 40 V @ Internal Thermal Shutdown lm TTLand 5 V CMOS Compatible Inputs I Integral Transient-Suppression Diodes ABSOLUTE MAXIMUM RATINGS at T, < 150°C Supply Voltage. Vg... 6eeeeeee reese OV Output Current loupe eee eee eee. 260A Input Voltage, Vay... .---- 22s eee 7OV Sense Voltage, Vecuge ++ 02202002 1.5 V Package Power Dissipation, Pyececeeceseeeeeeee +++ S00 Graph Operating Temperature Range, Tyeccceccceeenee ses 220%C to + 85°C ‘Storage Temperature Range, Ty eres eee eee e ees °65°C to + 150°C ‘Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any: ‘set of conditions, do not exceed the specified ‘ulput current raiing ofa junction temperature of +150°C, a Always order by complete part number: (UDN2955W-2] . ET 3-78 -

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£ 10, FUNCTIONAL BLOCK DIAGRAM TT oo ge N ll fleet VV) | on i NN on Ze | J —| .) 3 es 50 75 }00 25 50, 3 o 1: 1 TRUTH TABLE INPUTS OUTPUTS TYPICAL APPLICATION ENABLE SOURCE SINK|SOURCE SINK Low Low Low OFF ON Low High x ON OFF X = Irrelevant as 22 & 23] vianinp yi yinryinnin tow HEE ‘owl {T] OIRECTION ENABLE The printed wiring board should utilize a heavy ground plane. For ‘optimum performance, the driver should be soldered directly into the ‘board. The power supply (V,.) should be decoupled with an electrolytic capacitor (2 10 uF) as close as possible to pin 2. EE 3-79 _ |

. ALLEGRO MICROSYSTEMS INC 336 D M@™@ 0504338 0005157 0 MMALGR ELECTRICAL CHARACTERISTICS at T, = + 25°C, T, $+ 150°C, V, = 40 V Characteristic Symbol Test Conditions Min, Typ. Max. [ units | Output Leakage Current oex SINKoyy = 40 V, SOURCE, = 0.8 V, SINK, = 2.0 uA SOURCE, = OV. SOURCE, = 0.8 V, SINK,, = 2.0 — <10 -50] yA Output Sustaining Voltage lor = £6.0 A, L =10 mH jo - -|[v] Output Saturation Voltage Voesary | SINKoyr = 5.0A nc | SOURCEg,, = -5.0A SOURCE, = -6.0A Input Current SOURCE,, or SINK,, = 2.0 V — 30 10 Logico | SOURCE,, or SINK,, = 0.8 V — 40 +10 Propagation Delay tome Sink Driver (includes Turn-On Delay) [— 25 = [as | Source Driver us tou | Sink Driver ks Source Driver (includes Turn-On Delay) [— 25 — | as | Supply Current Icon SOURCE,, = 2.0 V [— 18 | ma SOURCE, = SINKy = 0.8 V — 0 2 [ ma | lyorn | SOURCE,,= 0.8 V, SINK,, = 2.0 V — 80 10 Flyback Diode Forward Voltage 1,=6.0A [- -— 2s[v] Diode Leakage Current fo | Each Diode, V,,= 40 V [— <0 50 | wa] NOTE: Typical Data is given for circuit design information only. Negative current is defined as coming out of (sourcing) the specified device pin. NES 3-80