DRV8811_15 Datasheet, PDF (5/32 Pages) Texas Instruments – DRV8811 Stepper Motor Controller IC

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DRV8811
SLVS865I – SEPTEMBER 2008 – REVISED JANUARY 2015
7.4 Thermal Information
THERMAL METRIC⁽¹⁾
DRV8811
PWP (HTSSOP)
UNIT
28 PINS
R_θJA
R_θJC(top)
R_θJB
ψ_JT
ψ_JB
R_θJC(bot)
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
31.4
19.3
11.5
°C/W
0.4
11.2
2.8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Dissipation Ratings
BOARD
Low-K ⁽¹⁾
Low-K ⁽²⁾
High-K ⁽³⁾
High-K ⁽⁴⁾
PACKAGE
PWP
PWP
PWP
PWP
R_{θ JA}
67.5 °C/W
39.5 °C/W
33.5 °C/W
28 °C/W
DERATING
FACTOR
ABOVE T_A = 25°C
14.8 mW/°C
25.3 mW/°C
29.8 mW/°C
35.7 mW/°C
T_A < 25°C
1.85 W
3.16 W
3.73 W
4.46 W
T_A = 70°C
1.18 W
2.02 W
2.38 W
2.85 W
T_A = 85°C
0.96 W
1.64 W
1.94 W
2.32 W
(1) The JEDEC Low-K board used to derive this data was a 76 mm x 114 mm, 2-layer, 1.6 mm thick PCB with no backside copper.
(2) The JEDEC Low-K board used to derive this data was a 76 mm x 114 mm, 2-layer, 1.6 mm thick PCB with 25 cm² 2-oz copper on
backside.
(3) The JEDEC High-K board used to derive this data was a 76 mm x 114 mm, 4-layer, 1.6 mm thick PCB with no backside copper and
solid 1 oz. internal ground plane.
(4) The JEDEC High-K board used to derive this data was a 76 mm x 114 mm, 4-layer, 1.6 mm thick PCB with 25 cm² 1-oz copper on
backside and solid 1 oz. internal ground plane.
7.6 Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
POWER SUPPLIES
I_VM
V_M operating supply current
V_M = 35 V, f_PWM < 50 KHz
I_VCC
V_CC operating supply current
f_PWM < 50 KHz
I_VMQ
V_M sleep mode supply current
V_M = 35 V
I_VCCQ V_CC sleep mode supply current
V_UVLO
V_M undervoltage lockout voltage
V_CC undervoltage lockout voltage
V_M rising
V_CC rising
VREF INPUT, CURRENT CONTROL ACCURACY
I_REF
VREF input current
ΔI_CHOP Chopping current accuracy
VREF = 3.3 V
VREF = 2.0 V, 70% to 100% current
VREF = 2.0 V, 20% to 56% current
LOGIC-LEVEL INPUTS
V_IL
Input low voltage
V_IH
Input high voltage
I_IL
Input low current
I_IH
Input high current
R_PU
Pullup resistance
R_PD
Pulldown resistance
VIN = 0.3 × V_CC
VIN = 0.3 × V_CC
ENABLEn, RESETn
DIR, STEP, SLEEPn, USM1, USM0, SRn
MIN
–3
–5%
–10%
0.7 × V_CC
–20
–20
TYP
MAX UNIT
4.5
8 mA
0.4
4 mA
12
20 μA
5
20 μA
6.7
8
V
2.71
2.95
3 μA
5%
10%
0.3 × V_CC V
V
20 μA
20 μA
1
MΩ
1
MΩ
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